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Skin

2013-08-10T23:46:00.000-07:00

Skin

The skin is an ever-changing organ that contains many specialized cells and structures. The skin functions as a protective barrier that interfaces with a sometimes-hostile environment. It is also very involved in maintaining the proper temperature for the body to function well. It gathers sensory information from the environment, and plays an active role in the immune system protecting us from disease. Understanding how the skin can function in these many ways starts with understanding the structure of the 3 layers of skin - the epidermis, dermis, and subcutaneous tissue.

Diagram of Skin Layers

Epidermis
The epidermis is the outer layer of skin. The thickness of the epidermis varies in different types of skin. It is the thinnest on the eyelids at .05 mm and the thickest on the palms and soles at 1.5 mm.

The epidermis contains 5 layers. From bottom to top the layers are named:

stratum basale
stratum spinosum
stratum granulosum
stratum licidum
stratum corneum

The bottom layer, the stratum basale, has cells that are shaped like columns. In this layer the cells divide and push already formed cells into higher layers. As the cells move into the higher layers, they flatten and eventually die.

The top layer of the epidermis, the stratum corneum, is made of dead, flat skin cells that shed about every 2 weeks.

Specialized Epidermal Cells
There are three types of specialized cells in the epidermis.

The melanocyte produces pigment (melanin)
The Langerhans' cell is the frontline defense of the immune system in the skin
The Merkel's cell's function is not clearly known

Dermis
The dermis also varies in thickness depending on the location of the skin. It is .3 mm on the eyelid and 3.0 mm on the back. The dermis is composed of three types of tissue that are present throughout - not in layers. The types of tissue are:

collagen
elastic tissue
reticular fibers

Layers of the Dermis
The two layers of the dermis are the papillary and reticular layers.

The upper, papillary layer, contains a thin arrangement of collagen fibers.
The lower, reticular layer, is thicker and made of thick collagen fibers that are arranged parallel to the surface of the skin.

Specialized Dermal Cells
The dermis contains many specialized cells and structures.

The hair follicles are situated here with the erector pili muscle that attaches to each follicle.
Sebaceous (oil) glands and apocrine (scent) glands are associated with the follicle.
This layer also contains eccrine (sweat) glands, but they are not associated with hair follicles.
Blood vessels and nerves course through this layer. The nerves transmit sensations of pain, itch, and temperature.
There are also specialized nerve cells called Meissner's and Vater-Pacini corpuscles that transmit the sensations of touch and pressure.

Subcutaneous Tissue
The subcutaneous tissue is a layer of fat and connective tissue that houses larger blood vessels and nerves. This layer is important is the regulation of temperature of the skin itself and the body. The size of this layer varies throughout the body and from person to person.

The skin is a complicated structure with many functions. If any of the structures in the skin are not working properly, a rash or abnormal sensation is the result. The whole specialty of dermatology is devoted to understanding the skin, what can go wrong, and what to do if something does go wrong.

Skin Anatomy

2013-08-10T23:45:00.000-07:00

The skin covers the entire external surface of the human body and is the principal site of interaction with the surrounding world. It serves as a protective barrier that prevents internal tissues from exposure to trauma, ultraviolet (UV) radiation, temperature extremes, toxins, and bacteria. Other important functions include sensory perception, immunologic surveillance, thermoregulation, and control of insensible fluid loss.

The integument consists of 2 mutually dependent layers, the epidermis and dermis, which rest on a fatty subcutaneous layer, the panniculus adiposus. (See the image below.) The epidermis is derived primarily from surface ectoderm but is colonized by pigment-containing melanocytes of neural crest origin, antigen-processing Langerhans cells of bone marrow origin, and pressure-sensing Merkel cells of neural crest origin. The dermis is derived primarily from mesoderm and contains collagen, elastic fibers, blood vessels, sensory structures, and fibroblasts.

Anatomy of the skin.

During the fourth week of embryologic development, the single cell thick ectoderm and underlying mesoderm begin to proliferate and differentiate. The specialized structures formed by the skin, including teeth, hair, hair follicles, fingernails, toenails, sebaceous glands, sweat glands, apocrine glands, and mammary glands also begin to appear during this period in development. Teeth, hair, and hair follicles are formed by the epidermis and dermis in concert, while fingernails and toenails are formed by the epidermis alone. Hair follicles, sebaceous glands, sweat glands, apocrine glands, and mammary glands are considered epidermal glands or epidermal appendages, because they develop as downgrowths or diverticula of the epidermis into the dermis.

The definitive multi-layered skin is present at birth, but skin is a dynamic organ that undergoes continuous changes throughout life as outer layers are shed and replaced by inner layers. Skin also varies in thickness among anatomic location, sex, and age of the individual. This varying thickness primarily represents a difference in dermal thickness, as epidermal thickness is rather constant throughout life and from one anatomic location to another. Skin is thickest on the palms and soles of the feet (1.5 mm thick), while the thinnest skin is found on the eyelids and in the postauricular region (0.05 mm thick).

Male skin is characteristically thicker than female skin in all anatomic locations. Children have relatively thin skin, which progressively thickens until the fourth or fifth decade of life when it begins to thin. This thinning is also primarily a dermal change, with loss of elastic fibers, epithelial appendages, and ground substance.

Epidermis

The epidermis contains no blood vessels and is entirely dependent on the underlying dermis for nutrient delivery and waste disposal via diffusion through the dermoepidermal junction. The epidermis is a stratified, squamous epithelium that consists primarily of keratinocytes in progressive stages of differentiation from deeper to more superficial layers. The named layers of the epidermis include the stratum germinativum, stratum spinosum, stratum granulosum, and stratum corneum.

Keratinocytes

The stratum germinativum, or the basal layer, is immediately superficial to the dermoepidermal junction. This single cell layer of keratinocytes is attached to the basement membrane via hemidesmosomes.

As keratinocytes divide and differentiate, they move from this deeper layer to the more superficial layers. Once they reach the stratum corneum, they are fully differentiated keratinocytes devoid of nuclei and are subsequently shed in the process of epidermal turnover. Cells of the stratum corneum are the largest and most abundant of the epidermis. This layer ranges in thickness from 15-100 or more cells depending on anatomic location and is the primary protective barrier from the external environment.

Melanocytes

Melanocytes, derived from neural crest cells, primarily function to produce a pigment, melanin, which absorbs radiant energy from the sun and protects the skin from the harmful effects of UV radiation. Melanin accumulates in organelles termed melanosomes that are incorporated into dendrites anchoring the melanosome to the surrounding keratinocytes. Ultimately, the melanosomes are transferred via phagocytosis to the adjacent keratinocytes where they remain as granules. Melanocytes are found in the basal layer of the epidermis as well as in hair follicles, the retina, uveal tract, and leptomeninges. These cells are the sites of origin of melanoma.

In areas exposed to the sun, the ratio of melanocytes to keratinocytes is approximately 1:4. In areas not exposed to solar radiation, the ratio may be as small as 1:30. Absolute numbers of melanosomes are the same among the sexes and various races. Differing pigmentation among individuals is related to melanosome size rather than cell number. Sun exposure, melanocyte-stimulating hormone (MSH), adrenocorticotropic hormone (ACTH), estrogens, and progesterones stimulate melanin production. With aging, a decline is observed in the number of melanocytes populating the skin of an individual. Since these cells are of neural crest origin, they have no ability to reproduce.

Langerhans cells

Langerhans cells originate from the bone marrow and are found in the basal, spinous, and granular layers of the epidermis. They serve as antigen-presenting cells. They are capable of ingesting foreign antigens, processing them into small peptide fragments, binding them with major histocompatibility complexes, and subsequently presenting them to lymphocytes for activation of the immune system. An example of activation of this component of the immune system is contact hypersensitivity.

Merkel cells

Merkel cells, also derived from neural crest cells, are found on the volar aspect of digits, in nail beds, on the genitalia, and in other areas of the skin. These cells are specialized in the perception of light touch.

Dermis

The primary function of the dermis is to sustain and support the epidermis. The dermis is a more complex structure and is composed of 2 layers, the more superficial papillary dermis and the deeper reticular dermis. The papillary dermis is thinner, consisting of loose connective tissue containing capillaries, elastic fibers, reticular fibers, and some collagen. The reticular dermis consists of a thicker layer of dense connective tissue containing larger blood vessels, closely interlaced elastic fibers, and coarse bundles of collagen fibers arranged in layers parallel to the surface.

The reticular layer also contains fibroblasts, mast cells, nerve endings, lymphatics, and epidermal appendages. Surrounding the components of the dermis is the gel-like ground substance, composed of mucopolysaccharides (primarily hyaluronic acid), chondroitin sulfates, and glycoproteins. The deep surface of the dermis is highly irregular and borders the subcutaneous layer, the panniculus adiposus, which additionally cushions the skin.

Fibroblasts

The fibroblast is the major cell type of the dermis. These cells produce and secrete procollagen and elastic fibers. Procollagen is terminally cleaved by proteolytic enzymes into collagen that aggregates and becomes cross-linked. These tightly cross-linked collagen fibers provide tensile strength and resistance to shear and other mechanical forces. Collagen makes up 70% of the weight of the dermis, primarily Type I (85% of the total collagen) and Type III (15% of the total collagen). Elastic fibers constitute less than 1% of the weight of the dermis, but they play an enormous functional role by resisting deformational forces and returning the skin to its resting shape.

Dermoepidermal Junction

The dermoepidermal junction is an undulating basement membrane that adheres the epidermis to the dermis. It is composed of 2 layers, the lamina lucida and lamina densa. The lamina lucida is thinner and lies directly beneath the basal layer of epidermal keratinocytes. The thicker lamina densa is in direct contact with the underlying dermis. These structures are the target of immunologic injury in bullous pemphigoid and epidermolysis bullosa.

Dermal papillae from the papillary dermis contain a plexus of capillaries and lymphatics oriented perpendicular to the skin surface. These fingerlike projections are surrounded by similar projections of the epidermis. This highly irregular junction greatly increases the surface area over which oxygen, nutrients, and waste products are exchanged between the dermis and the avascular epidermis.

Epidermal Appendages

Epidermal appendages are intradermal epithelial structures lined with epithelial cells with the potential for division and differentiation. These are important as a source of epithelial cells, which accomplish reepithelialization should the overlying epidermis be removed or destroyed in situations such as partial thickness burns, abrasions, or split-thickness skin graft harvesting.

Epidermal appendages include the following:

Sebaceous glands
Sweat glands
Apocrine glands
Mammary glands
Hair follicles

They often are found deep within the dermis and in the face may even lie in the subcutaneous fat beneath the dermis. This accounts for the remarkable ability of the face to reepithelialize even the deepest cutaneous wounds.

Sebaceous glands

Sebaceous glands, or holocrine glands, are found over the entire surface of the body except the palms, soles, and dorsum of the feet. They are largest and most concentrated in the face and scalp where they are the sites of origin of acne. The normal function of sebaceous glands is to produce and secrete sebum, a group of complex oils that include triglycerides and fatty acid breakdown products, wax esters, squalene, cholesterol esters, and cholesterol. Sebum lubricates the skin to protect it against friction and makes the skin more impervious to moisture.

Sweat glands

Sweat glands, or eccrine glands, are found over the entire surface of the body except the vermillion border of the lips, the external ear canal, the nail beds, the labia minora, and the glans penis and the inner aspect of the prepuce. They are most concentrated in the palms and soles and the axillae.

Each gland consists of a coiled secretory intradermal portion that connects to the epidermis via a relatively straight distal duct. The normal function of the sweat gland is to produce sweat, which cools the body by evaporation. The thermoregulatory center in the hypothalamus controls sweat gland activity through sympathetic nerve fibers that innervate the sweat glands. Sweat excretion is triggered when core body temperature reaches or exceeds a set point.

Apocrine and mammary glands

Apocrine glands are similar in structure, but not identical, to eccrine glands. They are found in the axillae, in the anogenital region, and, as modified glands, in the external ear canal (ceruminous glands), the eyelid (Moll's glands), and the breast (mammary glands). They produce odor and do not function prior to puberty, which means they probably serve a vestigial function. The mammary gland is considered a modified and highly specialized type of apocrine gland.

Hair follicles

Hair follicles are complex structures formed by the epidermis and dermis. (See the image below.) They are found over the entire surface of the body except the soles of the feet, palms, glans penis, clitoris, labia minora, mucocutaneous junction, and portions of the fingers and toes. Sebaceous glands often open into the hair follicle rather than directly onto the skin surface, and the entire complex is termed the pilosebaceous unit.

Anatomy of hair follicle.

Caucasian hair follicles are oriented obliquely to the skin surface, whereas the hair follicles of black persons are oriented almost parallel to the skin surface. Asian persons have vertically oriented follicles that produce straight hairs. These anatomic variations are an important consideration in avoiding alopecia when making incisions in the scalp.

The base of the hair follicle, or hair bulb, lies deep within the dermis and, in the face, may actually lie in the subcutaneous fat. This accounts for the remarkable ability of the face to re-epithelialize even the deepest cutaneous wounds. A band of smooth muscle, the arrector pili, connects the deep portion of the follicle to the superficial dermis. Contraction of this muscle, under control of the sympathetic nervous system, causes the follicle to assume a more vertical orientation.

Hair growth exhibits a cyclical pattern. The anagen phase is the growth phase, whereas the telogen phase is the resting state. The transition between anagen and telogen is termed the catagen phase. Phases vary in length according to anatomic location, and the length of the anagen phase is proportional to the length of the hair produced. At any one time at an anatomic location, follicles are found in all 3 phases of hair growth. This is extremely important for laser hair removal, because follicles in the anagen phase are susceptible to destruction, whereas resting follicles are more resistant. This explains why multiple treatments of an area may be necessary to ensure adequate hair removal.

Cutaneous Blood Supply

Cutaneous vessels ultimately arise from underlying named source vessels. Each source vessel supplies a 3-dimensional vascular territory from bone to skin termed an angiosome. Adjacent angiosomes have vascular connections via reduced caliber (choke) vessels or similar caliber (true) anastomotic vessels. The cutaneous vessels originate either directly from the source arteries (septocutaneous or fasciocutaneous perforators) or as terminal branches of muscular vessels (musculocutaneous perforators).

During their course to the skin, the cutaneous vessels travel within or adjacent to the connective tissue framework and supply branches to each tissue with which they come into close contact (bone, muscle, fascia, nerve, fat). They emerge from the deep fascia in the vicinity of the intermuscular or intramuscular septa or near tendons and travel toward the skin, where they form extensive subdermal and dermal plexuses. The dermis contains horizontally arranged superficial and deep plexuses, which are interconnected via communicating vessels oriented perpendicular to the skin surface. Cutaneous vessels ultimately anastomose with other cutaneous vessels to form a continuous vascular network within the skin. Clinically, this extensive horizontal network of vessels allows for random skin flapsurvival.

Thermoregulation

In addition to the skin's natural heat conductivity and loss of heat from the evaporation of sweat, convection from cutaneous vessels is a vital component of thermoregulation. Cutaneous blood flow is 10-20 times that required for essential oxygenation and metabolism, and large amounts of heat can be exchanged through the regulation of cutaneous blood flow. The thermoregulatory center in the hypothalamus controls vasoconstriction and vasodilatation of cutaneous vessels through the sympathetic nervous system.

Lymphatics

Skin lymphatics parallel the blood supply and function to conserve plasma proteins and scavenge foreign material, antigenic substances, and bacteria. Blind-ended lymphatic capillaries arise within the interstitial spaces of the dermal papillae. These unvalved, superficial dermal vessels drain into valved deep dermal and subdermal plexuses. These then coalesce to form larger lymphatic channels, which course through numerous filtering lymph nodes on their way to join the venous circulation near the subclavian vein – internal jugular vein junction bilaterally.

Skin Innervation

Sensory perception is critically important in the avoidance of pressure, mechanical or traumatic forces, and extremes of temperature. Numerous specialized structures are present in the skin to detect various stimuli. As previously mentioned, Merkel cells of the epidermis detect light touch. Meissner corpuscles also detect light touch. These are found in the dermal papillae and are most concentrated in the fingertips. Pacini corpuscles are found deep within the dermis or even in the subcutaneous tissue. These structures are specialized to detect pressure.

Pain is transmitted through naked nerve endings located in the basal layer of the epidermis. Krause bulbs detect cold, whereas Ruffini corpuscles detect heat. Heat, cold, and proprioception also are located in the superficial dermis. Cutaneous nerves follow the route of blood vessels to the skin. The area supplied by a single spinal nerve, or a single segment of the spinal cord, is termed a dermatome. Adjacent dermatomes may overlap considerably, which is important to note when performing field blocks with local anesthesia.

Surface Anatomy

Lines and creases are evident over major and minor joints. Skin contraction produces wrinkles and creases that lie perpendicular to the underlying muscular vector force. Relaxed skin tension lines (RSTL), however, are formed during relaxation and often follow a different direction than age and contracting wrinkles. (See the image below.) Relaxed skin tension lines are created by the natural tension on the skin from underlying structures.

Four main facial lines show the direction of relaxed skin tension lines

Papillary ridges on the tips of the digits of the hands and feet and the surface of palms and soles are often used for personal identification. These are also known as friction ridges, since they assist in the ability to grasp. They are formed during fetal development and are unique to each individual, including identical twins. This distinct pattern does not change with aging. Stratum mucosum composes the outer surface of the ridges with underlying dermal papillae. Sweat pores are usually located at the top of the ridges.

Skin Phototype

The amount of melanin pigment in the skin determines an individual's skin color (skin phototype). Skin pigment can be inherited genetically or can be acquired through various diseases. Hormonal changes during pregnancy can also vary the amount of pigmentation.

The Fitzpatrick Scale is used to classify skin complexion and response to UV exposure. (See table 1, below.) This classification is based on a personal history of sunburning and suntanning.This classification is used clinically for evaluation of facial skin pigmentation before resurfacing procedures and is important for predicting outcomes and adverse effects.

Table 1: The Fitzpatrick Scale (Open Table in a new window)

Skin Type	Color	Features
I	White or freckled skin	Always burns, never tans
II	White skin	Burns easily, tans poorly
III	Olive skin	Mild burn, gradually tans
IV	Light brown skin	Burns minimally, tans easily
V	Dark brown skin	Rarely burns, tans easily
VI	Black skin	Never burns, always tans

Anatomy of Aging Skin

Age-associated skin changes include thinning, skin laxity, fragility, and wrinkles. Sun-exposed areas demonstrate additional aging changes, including dyspigmentation, premature wrinkling, telangiectasia, and actinic elastosis.

Cutaneous aging is characterized by intrinsic and extrinsic processes. Intrinsic, or chronologic, aging is a genetically determined and inevitable process in skin, including photoprotected skin. Intrinsic aging naturally occurs and is exacerbated by extrinsic aging, which is environmentally induced.

Aging at the cellular level is thought to be related to cellular senescence, specifically, the shortening of telomeres (the terminal portions of chromosomes) with each cell cycle. Telomere shortening ultimately results in cell-cycle arrest or apoptosis once a critical length is reached.

Preventable environmental factors that amplify intrinsic aging include sun exposureand smoking. Long-term UV-A radiation exposure accelerates intrinsic aging via the formation of reactive oxygen species (ROS). ROS lead to inflammatory cytokines and the up-regulation of matrix metalloproteinases, which result in the breakdown of collagen. UV-B radiation can also contribute to this aging process by causing direct deoxyribonucleic acid (DNA) mutations.

Histopathologically, photoaging is manifest as flattening of the dermal-epidermal junction, resulting in decreased nutrient transfer between the layers, heliodermatitis or chronic inflammation, elongated and collapsed fibroblasts, disorganized collagen fibrils with overall decrease in collagen levels, and the accumulation of abnormal elastin-containing material termed solar elastosis.

Threading

2013-08-10T23:42:00.000-07:00

WHAT IS EYEBROW THREADING?

Threading is a method of hair removal dating back to ancient times. Extremely common in the Middle East and India, threading is becoming more popular in Western countries. The process involves removing body hair by the root, using a cotton thread. This type of hair removal is called Keith in Arabic and fatlah in Egyptian.
Eyebrow Threading is a practice of shaping the eyebrows using a cotton thread. The twisting action of the thread traps the hair and lifts it out of the follicle. It’s a very gentle, sanitary, and painless way of removing unwanted facial Hair.It is a common method used in India, China and other Eastern Countries. Threading is also used to remove hair from the upper and lower lip as well as other areas of the face. This method of hair removal is more effective and less painful than tweezing & waxing. Hair re-growth becomes finer and more sparse after regular treatments.In distinction to waxing, the top layers of skin are not peeled or traumatized in the process. The result ...a safe, simple, rapid, and highly effective method of hair removal. Because there is minimal chance of irritation, it is very well suited for the sensitive skin.Facial hair removal is the most common use for threading, especially trimming and shaping eyebrows. Hair on the chin, cheeks, sideburns, and upper lips can also be taken off with this technique. During the procedure, the technician loops a long piece of thread around the hairs targeted for removal and twists very quickly to pull the hairs out by the roots. The practitioner typically holds one end of the thread in one hand and the other in her mouth, while using the free hand to grasp and pluck the hairs.When compared to other methods of hair removal, threading has many pros and few cons. The biggest drawback is that skilled technicians can be difficult to find, especially outside of large and diverse urban areas. This procedure requires a particular skill set, along with training and practice to perfect the technique. Using a well-trained and experienced practitioner is vital to avoid poor results, such as crooked eyebrows or uneven hair removal.
The benefits of threading include cost, speed, ease, and cleanliness. Prices vary from salon to salon, but eyebrow threading can cost as little as a simple haircut. An expert can complete an entire eyebrow session in approximately five minutes, which is less time than it takes to apply the wax used for eyebrow waxing. Session times may be longer for different sections of hair, but threading tends to be faster than other hair removal techniques.
Fans say this procedure is less painful than other methods of hair removal. The process is not always pain free, however, and the feeling can be compared to plucking. Some people experience minor swelling, redness, or itching in the affected area, but this usually goes away within 15 or 20 minutes.
Cleanliness is vital when it comes to beauty services outside the home, and a threading salon typically offers a safe environment for hair removal. Waxing and tweezing require the use of instruments or substances to take the hair off, and contamination can lead to health problems. This technique requires only a cotton thread, which is discarded after every use, thus eliminating hygienic concerns. Since the process pulls hair out by the root, there is a slight possibility of infection, but cases are extremely rare.
Eyebrow threading is a depilation technique which originated in India, although it is also widely practiced in the Middle East. Salons in Western nations offered the service to Middle Eastern clients for decades before European and American women became interested and the popularity of eyebrow threading skyrocketed. The hair removal technique is not just for the eyebrows: threading can be used to remove other facial and body hair as well.
The technique is sometimes listed on salon menus as Keith or fatlah, which are both Arabic words for threading. Eyebrow threading involves twisting a piece of thread, usually cotton, into a double strand. This double stranded thread is used to pick up a line of hair and then remove it, creating a very clean, precise hairline. Eyebrow threading is the technique preferred by Indian movie stars, who are often distinguished by their crisp brow lines.
Eyebrow threading can be used to eliminate a unibrow, raise the arch of the eyebrow, or add shape and definition to the brow. Because it removes hair by the follicle, it is a reasonably long lasting hair removal technique as well. Repeat visits after three to four weeks are standard. The technique is also not terribly expensive because it is easy to do quickly and does not require costly chemical ingredients. For women who would like to pursue a more natural beauty regimen, eyebrow threading is a good choice, since it does not use harmful products.
Eyebrow threading is a preferred hair removal technique for a number of reasons. Unlike tweezing or plucking, eyebrow threading removes one clean line of hair all at once, making it much quicker and easier to shape the brows. Eyebrow threading also will not harm the skin like wax and some depilatory creams can. If done correctly, the skin should not be red or irritated for more than a few minutes after the eyebrow threading session. Some aestheticism also find it easier to shape eyebrows using this technique than other methods available.
It is important to find an aestheticism who is experienced at eyebrow threading. Inexperience can result in uneven brows, hair breakage. ingrown hairs, or unnecessary pain. Most urban areas have a wide variety of spas offering eyebrow threading, and many online resources offer reviews of the service, including photographs of clients. If you are unsure about a spa, look for one which is frequented by Middle Eastern and Indian clients with perfect eyebrows.

Why is Threading better than Waxing or Tweezing?

* Threading is more precise and the hair grows back finer and slower. There is no burning, peeling or irritation, and a great remedy for ingrown hair.

* Facial threading is good alternative to waxing and tweezing, especially for sensitive skin people who are on Retina A and accutane.

* Eyebrow threading not only removes unwanted hair around your eyebrow but also helps to get a precise and defined eyebrow shape according to your facial features.

* Most of all, threading exfoliates the skin, giving you a mini facial while the hair is being removed.

Benefits of hair threading.

Hair threading is a very sanitary and hygienic procedure because 1) each thread is thrown away after it’s used, and 2) only the thread touches the skin, so there’s no danger of passing on bacteria or dirt that can cause breakouts, and 3) it does not use chemicals, medicines, or any ingredients that could irritate sensitive skin.

Threading is also particularly effective at maintaining eyebrows, since the results are more even and natural-looking than what you’d get by waxing or tweezing. And wow, is it fast—in one fast twist you can get rid of unwanted hair. The entire procedure may even take less than two minutes for both eyebrows.
The effects are known to last 6 weeks, but if you do threading regularly the hair follicle will eventually stop producing hair at all—so results are permanent.

Disadvantages of threading hair

You need to have this procedure done by someone who’s experienced and skilled, since improper threading can cause hair to break. And, it only works on facial hair. Our advice is to go to a reputable salon, where the people are really trained, and won’t be practicing their amateurish skills on your brows!

Threading also leaves very little room for error. If someone yanks out more eyebrow hair than you really want, then you’re stuck with that look for at least 6 weeks. Once again, go to an expert.

And, of course, threading will hurt, but most hair removal procedures do. It is also not something you’d do at home, so there’s some cost involved—compared to plucking, which only requires a tweezers, a pencil, and this simple guide to shaping your eyebrow.