It is an infected tract under the skin, usually between the buttocks, in the natal cleft,containing a tuft of hair and which spontaneously drains through the openings.

Feature of the tract

Lining –

• Granulation tissue(Secondary)
• Stratified squamousepithelium (Primary)

Contents –

• Hairs
• Granulation tissue
• Epithelial scales & debris

Risk factor

• Obesity (deep gluteal fold)
• Family history
• Prolong sitting(mechanical strain)
• Grater amount of hair
• Excessive sweating
• Wearing tight jeans (local irritation)
• Age15-30 years (sex hormone induce glandular change in the hair follicles) (M:F-3:1)