Dermatoses: common in blacks.

Some skin disorders are more common in blacks than in whites or are so rare in whites as to be almost peculiar to blacks. Pigmentary abnormalities, either dark or light spots, often occur in association with inflammatory skin diseases. Curvature of the hair follicle is thought to be at the root of two other painful conditions, pseudofolliculitis of the beard and keloidal folliculitis. Certain hairstyles and treatments are damaging and can even cause alopecia if continued.