Traction alopecia results from the chronic application of tensile force to scalp hair (1). The condition was described as early as 1907 in subjects from Greenland who had developed hair loss due to prolonged wearing of tight ponytails (2). Traditionally, the term “traction alopecia” has been related to specific hairstyles that cause increased tension on the scalp (e.g., ponytails, Afro-Caribbean hair styles with tight braiding or the tightly wound turbans of Sikh men). It has also been seen in female ballerinas. It is also seen in cultural traditions where the hair is voluntarily not cut in religious obeisance, which causes progressively increasing weight of the hair itself. Traction alopecia is mechanical in etiology, rather than androgenic. Management includes cessation of the chronic traction. However, this is unacceptable to people who favor the specific hairstyles and styling techniques that give rise to the condition.
Traction alopecia is a substantial risk in hair extensions and weaves, which can be worn either to conceal hair loss, or purely for cosmetic purposes. The latter involves creating a braid around the head below the existing hairline, to which an extended-wear hairpiece, or wig, is attached. Because 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. Traction alopecia is one of the most common causes of hair loss in African American women. “Traction alopecia” includes hair loss or shedding due to increased traumatic force on hair follicles caused by hairstyle or mechanical hair procedures such as blow drying, flat ironing, hair curling and chronic brushing. Traction alopecia can also develop in patients constantly pulling their hair such as in trichotillomania.
In traction alopecia, affected areas depend on the etiology of the disorder, but usually hair loss is localized on frontal and temporal scalp. According to population studies in African women, prevalence of traction alopecia varies from 17.1% in young women (6-21 years) to 31.7% in older women (18-86 years). Clinical features of traction alopecia include itching of the scalp, perifollicular erythema, scaling, folliculitis, and pustules, but it can also present as slow onset of hair loss without other symptoms. Primarily, traction alopecia is considered noncicatricial, yet excessive tension can lead to permanent alopecia, due to physical damage of hair follicles. Prolonged force on hair follicles may lead to inflammatory changes in immune cell infiltrate and fibrosis can result. Therefore, it is important to recognize the condition early, while it is still reversible.
In view of the popularity of hairstyles that result in traction alopecia, and the desirability of use of hairstyling and care products that may cause traction alopecia, there is a need for treatment and prevention of hair loss associated with the condition.
USPTO Backgrounds
USPTO Backgrounds