![]() lichen simplex, a chronic skin condition that leads to itchiness and repeated scratching of a patch of skin.Hypertrichosis occurring in specific places on your body can develop from: certain drugs, such as androgenic steroids, the hair-growth drug minoxidil, and cyclosporine (Sandimmune).diet or an eating disorder like anorexia nervosa.porphyria cutanea tarda, a condition in which your skin is especially sensitive to light.When hair growth is everywhere or in random patches, possible causes include: By a mistake that still has no known cause, these hair-growth genes “turn on” while a baby is still in the womb.Īcquired hypertrichosis may have several origins. The genes that caused extensive hair growth in early man have “shut down” during the course of evolution. The causes of hypertrichosis aren’t well understood, though there is a form of the disease that tends to run in families.Ĭongenital hypertrichosis may be caused by reactivation of genes that cause hair growth. Some teeth may be missing, or your gums may be enlarged. Women with hirsutism develop stiff, dark body hair in places such as their face, chest, and back.Īnother common symptom of hypertrichosis is a problem with your gums or teeth. Terminal: The hair is long and thick, and usually very dark.If hypertrichosis is present, lanugo may remain unless treated and removed. Most babies lose lanugo within a few days or weeks after birth. Lanugo: This type of hair is very soft and fine, like that on the body of a newborn baby.They may be located anywhere but the soles of your feet, backs of your ears, lips, and palms, or on scar tissue. Vellus: The follicles for these hairs are usually short (less than 1/13th of an inch long, according to the Indian Journal of Endocrinology and Metabolism).Hypertrichosis usually produces one of three types of hair: Excess hair may grow in small patches or on all hair-growing areas of a person’s body.Īs mentioned previously, hypertrichosis can occur at birth or develop later in life. As well, it results in two types of hair other than lanugo: vellus hair or terminal hair. Acquired hypertrichosis: Unlike congenital hypertrichosis, the acquired form of the disease tends to develop later in life.It results in dark, thick hair growing in places women normally don’t have hair, such as their face, chest, and back. Hirsutism: This form of hypertrichosis is limited to women.In few cases, more than one patch of hair is present. Nevoid hypertrichosis: Excessive hair growth of any kind appears in a defined area.Hair, usually long and thick, covers the person’s face and body. Congenital hypertrichosis terminalis: Abnormal hair growth begins at birth and continues throughout a person’s life.But instead of disappearing during subsequent weeks, the soft fine hair continues to grow in various places on the baby’s body. Congenital hypertrichosis lanuginosa: It first appears as normal lanugo, the fine hair found on a baby, at birth.Oxford.There are several types of hypertrichosis: (1997) The handicap principle: a missing piece of Darwin’s puzzle. ![]() (2014) Bacterial ecology of hospital workers’ facial hair: a cross-sectional study. Wakeam, E., Hernandez, R.A., Rivera Morales, D., Finlayson, S.R., Klompas, M., Zinner, M.J. (2012) Dosimetric investigation of the solar erythemal UV radiation protection provided by beards and moustaches. Parisi, A.V., Turnbull, D.J., Downs, N., Smith, D. (2003) A naked ape would have fewer parasites. (2016) The masculinity paradox: facial masculinity and beardedness interact to determine women’s ratings of men’s facial attractiveness. W., Sulikowski, D., Gouda‐Vossos, A., Rantala, M.J., Brooks, R.C. Biological reviews of the Cambridge Philosophical Society, 90(1): 330-46. (2015) Protective buttressing of the hominin face. Integrative Organismal Biology, 2(1): obaa005. (2020) Impact protection potential of mammalian hair: Testing the pugilism hypothesis for the evolution of human facial hair. (2010) Of Lion Manes and Human Beards: Some Unusual Effects of the Interaction between Aggression and Sociality.
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