It is commonly seen with certain hair styles or braiding patterns that pull the hairline forcefully towards the vertex of the scalp, and has been reported more often in African American women (as some wear their hair tightly pulled back), in whom it can cause scarring. It has also been seen in female ballerinas, and in cultural traditions where the hair is voluntarily not cut in religious obeisance, the latter caused by progressively increasing weight of the hair itself.<unk>  is mechanical in cause, rather than androgenic, and treatment is typically not pharmaceutical. Management includes cessation of the chronic<unk> , cosmeses, with surgical restoration reserved for more severe cases.<unk>  is a substantial risk in hair weaves, which can be worn either to conceal hair loss, or purely for cosmetic purposes. The former involves creating a braid around the head below the existing hairline, to which an extended-wear hairpiece, or wig, is attached. Since the hair of the braid is still growing, it requires frequent maintenance, which involves the hairpiece being removed, the natural hair braided again, and the piece snugly reattached. The tight braiding and snug hairpiece cause tension on the hair that is already at risk for falling out.<unk>  is one of the most common causes of hair loss in African American women. Sikh men are also susceptible to<unk>  if the hair under the turban is tied too tightly for many years. Other causes include: * Hairstyle. Although the aforementioned style is one of the culprits, hairstyles such as dreadlocks and single (extension) braids can also have the same effect. Men and women who have suffered from<unk>  have found that the hair loss occurs most at the hair line—primarily around the temples and the sides of their heads. * Headgear. Compressive safety helmets worn tightly and closely to the scalp are a cause of<unk> . The lining of tightly fitted safety helmets like those worn for activities such as motorcycling, cycling, skiing and snowboarding are responsible for the constant rubbing and tugging of localised areas of the hair and scalp. Frequent wearers or those who use such helmets for prolonged periods seem more likely to suffer<unk> . * Chemicals. A condition known as CCCA (central cicatricial centrifugal<unk> , seen almost exclusively in African American women, can cause extensive hair loss. It is caused by a combination of too much stress<unk>  on the hair and the use of harsh relaxers and dyes.
Traction alopecia
Pressure alopecia
Frictional alopecia
Triangular alopecia
Tar melanosis
Hot comb alopecia
Hypertrichosis cubiti
Cat-scratch disease