“…The secondary role played by the hair in pilonidal sinus was explained by Bascom et al [6]; hairs in the distorted follicles are pushed down through the floor of the follicle, which is already distended with keratin [7], which then join other follicle content in creating inflammation of Outcomes after treatment Completion of therapy, currently on review 6 Therapy incomplete, currently still receiving therapy 10 Required surgical treatment, given early recurrence of disease 1 Required conservative management of recurrent disease 2 a Comparison of median duration of therapy and disease-free interval was found to be statistically significant (p < 0.01, Wilcoxon signed rank test) Fig. 1 Variation of hair density (cm 2 )-before and after laser therapy subcutaneous tissue, thus leading to formation of a pilonidal abscesses [8]. Hairs that originate elsewhere on the body do not penetrate intact skin but enter through an existing hole in the skin of the cleft [5,9], which had formed by the perforating folliculitis.…”