hello,Pilonidal sinus disease (PSD) is a painful disorder usually found in the natal cleft; it is diagnosed by the presence of a characteristic epithelial track between the buttocks . The sinuses may be caused by hair growing into the skin where there is excessive body hair or if tight clothing is worn, and is often seen in occupations such as barbers and shepherds, as well as those that involve sitting for long periods . The pits in the dermis tend to be distended with debris, but not all this debris is made up of hair. Primary treatment for PSD is by surgery but there is a high recurrence rate. Laser hair removal reduces the rate of recurrence by diminishing the number and thickness of hairs. It should be recommended along with personal hygiene measures for patients to reduce both short-term and long-term recurrence of the condition.