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the excessive growth of hair on a person’s body where only downy hairs usually grow.

There are several kinds of hypertrichosis. Heterogeneous hypertrichosis occurs in girls and women; it is the appearance of a beard, moustache, or male-type hair growth. (In men, pubic hair grows in a diamond shape; in women, in the form of a triangle with the upper boundary the horizontal side.) Hair growth increases during the period of sexual development and before or during the climacteric. Heterochronous hypertrichosis is the premature appearance of hair as a secondary sex characteristic (the appearance of a beard, moustache, or pubic hair in children). It is caused by a developmental anomaly or a disease of the endocrine glands. Heterotypic hypertrichosis is an increased amount of hair in unusual places, such as the small of the back. Hypertrichosis can be partial, local, or distributed over the whole body. Limited hypertrichosis can be either hereditary or elicited by prolonged mechanical, chemical, thermal, or physical trauma.

In women with excessive growth of downy hairs on the face or extremities, pulling out the hairs, shaving, or applying greasy creams or depilatories can cause significant thickening of the hairs, which become coarse and stiff and begin to grow faster than usual. An application of a 10-15 percent solution of hydrogen peroxide makes the hairs colorless and less noticeable but does not curtail their growth. Depilatories (preparations which dissolve the core of the hair and do not affect the papillae from which they grow) can be applied in extreme cases and only on covered parts of the body. The best treatment consists of electroepilation with the aid of electrolysis, ultrahigh frequency, and diathermy.


References in periodicals archive ?
40 Gingival Fibromatosis is most commonly associated with hypertrichosis with or without mental retardation.
After cessation of CsA, hypertrichosis decreased gradually, without any requirement of additional cosmetic interventions, and the patient is alive without any treatment and considered as secondary HLH.
McEwen, "The Problem of Hypertrichosis, "Journal of Cutaneous Diseases Including Syphilis 35 (1917): 833.
Hypertrichosis describes the excessive growth of androgen-independent hair prominent in non-sexual areas, and is most commonly caused by systemic disorders or medications like minoxidil.
Hypertrichosis (Fig 5) (horse's tail): excessive growth of hair in the midline of the thoracic and lumbar region
Minoxidil, the other vasodilator used for hypertension, is not recommended during pregnancy because hypertrichosis has been observed in newborns exposed in utero.
While the medical explanation for L'Homme chien and his son's condition was hypertrichosis, extra-scientific theories abounded regarding whether or not they were isolated accidents, atavistic representatives of a lost race, such as the cynocephales of ancient Egypt, or actual examples of transformist theories -- "missing links.
Congenital generalized hypertrichosis is a rare genetic trait thought to be transmitted on the X chromosome.
Bearded Woman Finds Son: Vivian Wheeler was born with hypertrichosis (werewolf syndrome) and as a hermaphrodite (both male and female reproductive organs) and was told she couldn't have children.
Optometrists will be aware of thickening and lengthening of the eyelashes and hypertrichosis as side effects of the prostanoid group of drugs.
This group comprises many different, but individually rare, variants, but the key feature is that almost all have obvious cutaneous stigmata including subcutaneous lipoma, hypertrichosis (a hairy patch), caudal appendage, capillary haemangioma or dermal sinus (Fig.