Hair removal - Wikipedia - Chia Sẻ Kiến Thức Điện Máy Việt Nam

Temporary removal of body toàn thân hair
For hair loss, see alopecia

Anterior view of major and minor ( lighter color ) body toàn thân hair growth areas in males and females

Hair removal, also known as epilation or depilation, is the deliberate removal of body hair or head hair.

Hair typically grows all over the human body toàn thân and can vary in thickness and length across human populations. Hair can become more visible during and after puberty and men tend to have thicker, more visible body toàn thân hair than women. [ 1 ] Both males and females have visible body toàn thân hair on the head, eyebrows, eyelashes, armpits, genital area, arms, and legs. Males and some females may also have thicker hair growth on their face, abdomen, back, buttocks, anus, areola, chest, nasal, and ear. Hair does not generally grow on the lips, the underside of the hands or feet, or on certain areas of the genitalia .Hair removal may be practiced for cultural, aesthetic, hygienic, sexual, medical, or religious reasons. Forms of hair removal have been practiced in almost all human cultures since at least the Neolithic era. The methods used to remove hair have varied in different times and regions .The word ” depilation ” comes from the Latin ” pilus ” which means ” hair ” .

History[edit]

Vintage advert for the Milady Décolleté Gillette women’s safety razor – 1916For centuries, hair removal has long shaped gender roles, served to signify social status and defined notions of femininity and the ideal ” body toàn thân image “. [ 2 ] [ 3 ] In early periods, the condition of being hairless was mostly done as a way to keep the body toàn thân clean, using flint, seashells, beeswax and various other depilatory utensils and exfoliator substances, some highly questionable and highly caustic. [ 3 ] [ 4 ] Ancient Rome also associated hair removal with status : a person with smooth skin was associated with purity and superiority. Removing body toàn thân hair was done by both men and women. [ 2 ] [ 3 ]

In Ancient Egypt, besides being a fashion statement for affluent Egyptians of all genders,[3][5] hair removal served as a treatment for louse infestation, which was a prevalent issue in the region.[6] Very often, they would replace the removed head hair with a Nubian wig, which was seen as easier to maintain and also fashionable.[6] In ancient times, one highly abrasive depilatory paste used consisted of an admixture of slaked lime, water, wood-ash and yellow orpiment (arsenic trisulfide); In rural India and Iran, where this mixture is called vajibt, it is still commonly used to remove pubic hair.[3][4][7] In other cultures, oil extracted from unripe olives (which had not reached one-third of their natural stage of ripeness) was used to remove body hair.[8]

During the medieval period, Catholic women were expected to let their hair grow long as a display of femininity, whilst keeping the hair concealed by wearing a wimple headdress in public places. [ 2 ] The face was the only area where hair growth was considered unsightly ; 14 th – century ladies would also pick off hair from their foreheads to recede the hairline and give their face a more oval form. From the mid-16th century, it is said when Queen Elizabeth I came to power, she made eyebrow removal fashionable. [ 2 ]

By the 18th century, body hair removal was still considered a non-necessity by European and American women. Nevertheless, when the first safety straight razor appeared for men to safely shave their beard and not inadvertently cut their throat, invented by the French master cutler Jean-Jacques Perret [fr] in Paris 1760 and author of La pogonotomie, ou L’art d’apprendre à se raser soi-même (Pogonotomy, or The Art of Learning to Shave Oneself), some women allegedly used this safety razor too.[2]

It was not until the late 19 th century that women in Europe and America started to make hair removal a component of their personal care regime. According to Professor Rebecca Herzig, the modern-day notion of body toàn thân hair being unwomanly can be traced back to Charles Darwin ‘ s book first published in 1871 ” The Descent of Man and Selection in Relation to Sex “. Darwin’s theory of natural selection associated body toàn thân hair with ” primitive ancestry and an atavistic return to earlier less developed forms “, writes Herzig, a professor of gender and sexuality studies at Bates College in Maine. [ 2 ] Darwin also suggests having less body toàn thân hair was an indication of being more evolved and sexually attractive. [ 2 ] As Darwin’s ideas polarized, other 19 th century medical and scientific experts started to link hairiness to ” sexual inversion, disease pathology, lunacy, and criminal violence “. Thos e connotations were mostly applied to women’s and not men’s body toàn thân hair. [ 2 ]By the early 20 th century, the upper – and middle-class white America increasingly saw smooth skin as a marker of femininity, and female body toàn thân hair as repulsive, with hair removal giving ” a way to separate oneself from cruder people, lower class and immigrant “. [ 2 ]Harper’s Bazaar, in 1915, was the first women’s fashion magazine to run a chiến dịch devoted to the removal of underarm hair as ” a necessity “. Shortly after, Gillette launched the first safety razor marketed specifically for women — the ” Milady Décolleté Gillette “, one that solves ” .. an embarrassing personal problem ” and to keep the underarm ” .. white and smooth “. [ 2 ]

Cultural and sexual aspects[edit]

Body hair characteristics such as thickness and length vary across human populations, some people have less pronounced body toàn thân hair and others more conspicuous body toàn thân hair characteristics .Each culture of human society developed social norms relating to the presence or absence of body toàn thân hair, which has changed from one time to another. Different standards of human physical appearance and physical attractiveness can apply to females and males. People whose hair falls outside a culture’s aesthetic body toàn thân image standards may experience real or perceived social acceptance problems, psychological distress and social pressure. For example, for women in several societies, exposure in public of body toàn thân hair other than head hair, eyelashes and eyebrows is generally considered to be unaesthetic, unattractive and embarrassing. [ 9 ]With the increased popularity in many countries of women wearing fashion clothing, sportswear and swimsuits during the 20 th century and the consequential exposure of parts of the body toàn thân on which hair is commonly found, there has emerged a popularization for women to remove visible body toàn thân hair and hirsutism, such as on legs, underarms and elsewhere. [ 2 ] [ 10 ] In most of the Western world, for example, the vast majority of women regularly shave their legs and armpits, while roughly half also shave hair that may become exposed around their đồ lót pelvic area ( often termed the ” đồ lót line ” ). [ 2 ]In Western and Asian cultures, in contrast to most Middle Eastern cultures, a majority of men are accustomed to shaving their facial hair, so only a minority of men reveal a beard, even though fast-growing facial hair must be shaved daily to achieve a clean-shaven or beardless appearance. Some men shave because they cannot genetically grow a ” full ” beard ( generally defined as an even density from cheeks to neck ), their beard color is genetically different from their scalp hair color, or because their facial hair grows in many directions, making a groomed or contoured appearance difficult to achieve. Some men shave because their beard growth is very excessive, unpleasant, or coarse, causing skin irritation. Some men grow a beard or moustache from time to time to change their appearance or visual style .Some men tonsure or head shave, either as a religious practice, a fashion statement, or because they find a shaved head preferable to the appearance of male pattern baldness, or in order to attain enhanced cooling of the skull – particularly for people suffering from hyperhidrosis. A much smaller number of Western women also shave their heads, often as a fashion or political statement .Some women also shave their heads for cultural or social reasons. In India, tradition required widows in some sections of the society to shave their heads as part of being ostracized ( see Women in Hinduism § Widowhood and remarriage ). The outlawed custom is still infrequently encountered mostly in rural areas. The society at large and the government are working to end the practice of ostracizing widows. [ 11 ] In addition, it continues to be common practice for men to shave their heads prior to embarking on a pilgrimage .Women with unibrows is considered a sign of beauty and attractive in Oman and for both genders in Tajikistan, often emphasized with kohl. [ 2 ] In Middle Eastern societies, regular trimming or removal of female and male underarm hair and pubic hair has been considered proper personal hygiene, necessitated by local customs, for many centuries. [ 3 ] [ 12 ] [ 13 ] Young girls and unmarried women, however, are expected to retain their body toàn thân hair until shortly before marriage, when the whole body toàn thân is depilated from neck down. [ 3 ]In Trung Quốc, body toàn thân hair has long been regarded normal, and even today women are confronted with far less social pressure to remove body toàn thân hair. [ 2 ] The same exists for other countries in Asia. Whilst hair removal has become routine for many of the continent’s younger women, trimming or removing pubic hair, for instance, is not as common or popular as in the Western world, [ 2 ] where both women and men may trim or remove all their pubic hair for aesthetic or sexual reasons. This custom can be motivated by reasons of potentially increased personal cleanliness or hygiene, heightened sensitivity during sexual activity, or the desire to take on a more exposed appearance or visual appeal, or to boost self-esteem when affected by excessive hair. In Korea, for example, pubic hair has long been considered a sign of fertility and sexual health, and it has been reported in the mid-2010s that some Korean women were undergoing pubic hair transplants, to add extra hair, [ 2 ] especially when affected by the condition of pubic atrichosis ( or hypotrichosis ), which is thought to affect a small percentage of Korean women. [ 14 ]Moreover, unwanted or excessive hair is often removed in preparatory situations by both sexes, in order to avoid any perceived social stigma or prejudice. For example, unwanted or excessive hair may be removed in preparation for an intimate encounter, or before visiting a public beach or swimming pool .Though traditionally in Western culture women remove body toàn thân hair and men do not, some women choose not to remove hair from their bodies, either as a non-necessity or as an act of rejection against what they regard a social stigma, while some men remove or trim their body toàn thân hair, a practice that is referred to in modern society as being a part of ” manscaping ” ( a portmanteau expression for male-specific grooming ) .

Fashions[edit]

The term ” glabrousness ” also has been applied to human fashions, wherein some participate in culturally motivated hair removal by depilation ( surface removal by shaving, dissolving ), or epilation ( removal of the entire hair, such as waxing or plucking ) .

Although the appearance of secondary hair on parts of the human body commonly occurs during puberty, and therefore, is often seen as a symbol of adulthood, removal of this and other hair may become fashionable in some cultures and subcultures. In many modern Western cultures, men are encouraged to shave their beards, and women are encouraged to remove hair growth in various areas. Commonly depilated areas for women are the underarms, legs, and pubic hair. Some individuals depilate the forearms. In recent years, bodily depilation in men has increased in popularity among some subcultures of Western males.[citation needed]

For men, the practice of depilating the pubic area is commonly referred to as manscaping, even though technically this term is applicable to hair removal all over the body toàn thân. Many men will try this at some point in their lives, especially for aesthetic reasons. Most men will use a razor to shave this area, however, as best practice, it is recommended to use a body toàn thân trimmer to shorten the length of the hair before shaving it off completely .

Cultural and other influences[edit]

In ancient Egypt, depilation was commonly practiced, with pumice and razors used to shave.[15][16] In both Ancient Greece and Ancient Rome, the removal of body and pubic hair may have been practiced among both men and women. It is represented in some artistic depictions of male and female nudity,[citation needed] examples of which may be seen in red figure pottery and sculptures like the Kouros of Ancient Greece in which both men and women were depicted without body or pubic hair. Emperor Augustus was said, by Suetonius, to have applied “hot nutshells” on his legs as a form of depilation.[17]

The majority of Muslims believe that adult removal of pubic and axillary hair, as a hygienic measure, is religiously beneficial. [ 18 ]

Baptized Sikhs are specifically instructed to have unshorn Kesh (the hair on their head and beards for men) this is a major tenet of the Sikh faith (see Kesh).

In the clothes free movement, the term “smoothie” refers to an individual who has removed their body hair. In the past, such practices were frowned upon and in some cases, members of clothes-free clubs were forbidden to remove their pubic hair: violators could face exclusion from the club. Enthusiasts grouped together and formed societies of their own that catered to that fashion and the fashion became more popular, with smoothies becoming a major percentage at some nudist venues.[19] The first Smoothie club (TSC) was founded by a British couple in 1991.[20] A Dutch branch was founded in 1993[21] in order to give the idea of a hairless body greater publicity in the Netherlands. Being a Smoothie is described by its supporters as exceptionally comfortable and liberating. The Smoothy-Club is also a branch of the World of the Nudest Nudist (WNN) and organizes nudist ship cruises and nudist events every month. Every year in spring the club organizes the international Smoothy days.

Other reasons[edit]

Religion[edit]

Head-shaving (tonsure) is a part of some Buddhist, Christian, Muslim, Jain and Hindu traditions.[22] Buddhist and Christian monks generally undergo some form of head-shaving or tonsure during their induction into monastic life.[citation needed]

Within the Amish society, tradition ordains men to stop shaving a part of their facial hair upon marriage and grow a Shenandoah style beard which serves the significance of wearing a wedding ring, moustaches are rejected as they are regarded as martial ( traditionally associated with the military ). [ 23 ]

In Judaism (see Shaving in Judaism), there is no obligation for women to remove body hair or facial hair, unless they wish to do so. However, in preparation for a woman’s immersion in a ritual bath after concluding her days of purification (following her menstrual cycle), the custom of Jewish women is to shave off their pubic hair.[24] During a mourning ritual, Jewish men are restricted in the Torah and Halakha to using scissors and prohibited from using a razor blade to shave their beards or sideburns,[25] and, by custom, neither men nor women may cut or shave their hair during the shiva period.[26][27]

The Baháʼí Faith recommends against complete and long-term head-shaving outside of medical purposes. It is not currently practiced as a law, contingent upon a future decision by the Universal House of Justice, its highest governing body toàn thân. Sikhs take an even stronger stance, opposing all forms of hair removal. One of the ” Five Ks ” of Sikhism is Kesh, meaning ” hair “. [ 28 ] To Sikhs, the maintenance and management of long hair is a manifestation of one’s piety. [ 28 ]

Under Muslim law (Sharia), it is recommended to keep the beard.[citation needed] A Muslim may trim or cut hair on the head. In the 9th century, the use of chemical depilatories for women was introduced by Ziryab in Al-Andalus.[citation needed]

Ancient Egyptian priests also shaved or depilated all over daily, so as to present a “pure” body before the images of the gods.[citation needed]

Medical[edit]

Very pronounced upper body toàn thân hair growth on an adult male Maui islander

The body hair of surgical patients is often removed beforehand on skin surrounding surgical sites. Shaving was the primary form of hair removal until reports in 1983 showed that it may lead to increased risk of infection. [29] Clippers are now the recommended pre-surgical hair removal method.[30][31] A 2021 systematic review brought together evidence on different techniques for hair removal before surgery. This involved 25 studies with a total of 8919 participants. Using a razor probably increases the chance of developing a surgical site infection compared to using clippers or hair removal cream or not removing hair before surgery.[32] Removing hair on the day of surgery rather than the day before may also slightly reduce the number of infections.[32]

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Some people with trichiasis find it medically necessary to remove ingrown eyelashes. [ 33 ]The shaving of hair has sometimes been used in attempts to eradicate lice or to minimize body toàn thân odor due to accumulation of odor-causing micro-organisms in hair. In extreme situations, people may need to remove all body toàn thân hair to prevent or combat infestation by lice, fleas and other parasites. Such a practice was used, for example, in Ancient Egypt. [ 34 ]It has been suggested that an increasing percentage of humans removing their pubic hair has led to reduced crab louse populations in some parts of the world. [ 35 ] [ 36 ]

In the military[edit]

A buzz cut or completely shaven haircut is common in military organizations where, among other reasons, it is considered to promote uniformity and neatness. [ 37 ] [ 38 ] Most militaries have occupational safety and health policies that govern the hair length and hairstyles permitted ; [ 37 ] in the field and living in close-quarter environments where bathing and sanitation can be difficult, soldiers can be susceptible to parasite infestation such as head lice, that are more easily propagated with long and unkept hair. [ 39 ] It also requires less maintenance in the field and in adverse weather it dries more quickly. Short hair is also less likely to cause severe burns from flash flame exposure ( as a result of flash fires from explosions ) which can easily set hair alight. [ 37 ] Short hair can also minimize interference with safety equipment and fittings attached to the head, such as combat helmets and NBC suits. [ 37 ] Militaries may also require men to maintain clean-shaven faces as facial hair can prevent an air-tight seal between the face and military gas masks or other respiratory equipment, such as a pilot’s oxygen mask, or full-face diving mask. [ 37 ] The process of testing whether a mask is an adequately good fit to a person’s face is known as a ” respirator fit test ” .In many militaries, head-shaving ( known as the induction cut ) is mandatory for men when beginning their recruit training. However, even after the initial recruitment phase, when head-shaving is no longer required, many soldiers maintain a completely or partially shaven hairstyle ( such as a ” high and tight “, ” flattop ” or ” buzz cut ” ) for personal convenience or neatness. Head-shaving is not required and is often not permitted for women in military service, although they must have their hair cut or tied to regulation length. [ 38 ] For example, the shortest hair a female soldier can have in the U.S. Army is 1/4 inch from the scalp. [ 40 ]

In sport[edit]

It is a common practice for professional footballers (soccer players) and road cyclists to remove leg hair for a number of reasons. In the case of a crash or tackle, the absence of the leg hair means the injuries (usually road rash or scarring) can be cleaned up more efficiently, and treatment is not impeded. Professional cyclists, as well as professional footballers, also receive regular leg massages, and the absence of hair reduces the friction and increases their comfort and effectiveness.[citation needed] Football players are also required to wear shin guards, and in case of a skin rash the affected area can be treated more efficiently.

It is also common for competitive swimmers to shave the hair off their legs, arms, and torsos ( and even their whole bodies from the neckline down ), to reduce drag and provide a heightened ” feel ” for the water by removing the exterior layer of skin along with the body toàn thân hair. [ 41 ]

As punishment[edit]

In some situations people’s hair is shaved as a punishment or a form of humiliation. After World War II, head-shaving was a common punishment in France, the Netherlands, and Norway for women who had collaborated with the Nazis during the occupation, and, in particular, for women who had sexual relations with an occupying soldier. [ 42 ]

In the United States, during the Vietnam War, conservative students would sometimes attack student radicals or “hippies” by shaving beards or cutting long hair. One notorious incident occurred at Stanford University, when unruly fraternity members grabbed Resistance founder (and student-body president) David Harris, cut off his long hair, and shaved his beard.

During European witch-hunts of the Medieval and Early Modern periods, alleged witches were stripped naked and their entire body toàn thân shaved to discover the so-called witches ‘ marks. The discovery of witches ‘ marks was then used as evidence in trials. [ 43 ]

Inmates have their head shaved upon entry at certain prisons.[citation needed]

Forms of hair removal and methods[edit]

Depilation is the removal of the part of the hair above the surface of the skin. The most common form of depilation is shaving or trimming. Another option is the use of chemical depilatories, which work by breaking the disulfide bonds that link the protein chains that give hair its strength.
Epilation is the removal of the entire hair, including the part below the skin. Methods include waxing, sugaring, epilators, lasers, threading, intense pulsed light or electrology. Hair is also sometimes removed by plucking with tweezers.

Many products in the market have proven fraudulent. Many other products exaggerate the results or ease of use .

Depilation methods[edit]

” Depilation “, or temporary removal of hair to the level of the skin, lasts several hours to several days and can be achieved by

Shaving or trimming (manually or with electric shavers)
Depilatories (creams or “shaving powders” which chemically dissolve hair)
Friction (rough surfaces used to buff away hair)

Epilation methods[edit]

” Epilation “, or removal of the entire hair from the root, lasts several days to several weeks and may be achieved by

Permanent hair removal[edit]

Electrology has been practiced in the United States since 1875.[52] It is approved by the FDA. This technique permanently destroys germ cells[citation needed] responsible for hair growth by way of insertion of a fine probe into the hair follicle and the application of a current adjusted to each hair type and treatment area.[citation needed] Electrology is the only permanent hair removal method recognized by the FDA.[53]

Permanent hair reduction[edit]

Laser hair removal (lasers and laser diodes): Laser hair removal technology became widespread in the US and many other countries from the 1990s onwards. It has been approved in the United States by the FDA since 1997. With this technology, light is directed at the hair and is absorbed by dark pigment, resulting in the destruction of the hair follicle. This hair removal method sometimes becomes permanent after several sessions. The number of sessions needed depends upon the amount and type of hair being removed. Equipment for performing laser hair removal at home has become available in recent[when ?] years.
Intense pulsed light (IPL)
Diode epilation (high energy LEDs but not laser diodes)

Clinical comparisons of effectiveness[edit]

A 2006 review article in the journal ” Lasers in Medical Science ” compared intense pulsed light ( IPL ) and both alexandrite and diode lasers. The review found no statistical difference in effectiveness, but a higher incidence of side effects with diode laser-based treatment. Hair reduction after 6 months was reported as 68.75 % for alexandrite lasers, 71.71 % for diode lasers, and 66.96 % for IPL. Side effects were reported as 9.5 % for alexandrite lasers, 28.9 % for diode lasers, and 15.3 % for IPL. All side effects were found to be temporary and even pigmentation changes returned to normal within 6 months. [ 54 ]A 2006 meta-analysis of randomized controlled trials found that alexandrite and dioded lasers caused 50 % hair reduction for up to 6 months, while there was no evidence of hair reduction from intense pulsed light, neodymium-YAG or ruby lasers. [ 55 ]

Experimental or banned methods[edit]

Photodynamic therapy for hair removal (experimental)
X-ray hair removal is an efficient, and usually permanent, hair removal method, but also causes severe health problems, occasional disfigurement, and even death.[56] It is illegal in the United States.

Doubtful methods[edit]

Many methods have been proposed or sold over the years without published clinical proof they can work as claimed .

Electric tweezers
Transdermal electrolysis
Transcutaneous hair removal
Microwave hair removal
Foods and dietary supplements
Non-prescription topical preparations (also called “hair inhibitors”, “hair retardants”, or “hair growth inhibitors”)

Advantages and disadvantages[edit]

There are several disadvantages to many of these hair removal methods .Hair removal can cause some issues : skin inflammation, minor burns, lesions, scarring, ingrown hairs, bumps, and infected hair follicles .Some removal methods are not permanent, can cause medical problems and permanent damage, or have very high costs. Some of these methods are still in the testing phase and have not been clinically proven .One issue that can be considered an advantage or a disadvantage depending upon an individual’s viewpoint, is that removing hair has the effect of removing information about the individual’s hair growth patterns due to genetic predisposition, illness, androgen levels ( such as from pubertal hormonal imbalances or drug side effects ), and / or gender status .In the hair follicle, stem cells reside in a discrete microenvironment called the bulge, located at the base of the part of the follicle that is established during morphogenesis but does not degenerate during the hair cycle. The bulge contains multipotent stem cells that can be recruited during wound healing to help the repair of the epidermis. [ 57 ]

References[edit]

Citations

Hair removal – Wikipedia