Interdigital pilonidal sinus of the foot.

Pilonidal sinus of the interdigital spaces is a common condition among barbers. The condition results from a foreign body reaction to clients' hairs. It is thought that the short sharp hairs penetrate the skin when hands are rubbed through freshly cut hair. We present an unusual case of a pilonidal sinus arising in the interdigital spaces of the foot in a female hairdresser. This is to our knowledge only the second such case reported in the literature.