<unk>  is a type of skin infection which typically occurs as a cyst between the cheeks of the buttocks and often at the upper end. Symptoms may include pain, swelling, and redness. There may also be drainage of fluid, but rarely a fever. Risk factors include obesity, family history, prolonged sitting, greater amounts of hair, and not enough exercise. The underlying mechanism is believed to involve a mechanical process. The lesions may contain hair and skin debris. Diagnosis is based on symptoms and examination. If there is infection, treatment is generally by incision and drainage just off the midline. Shaving the area and laser hair removal may prevent recurrence. More extensive surgery may be required if the<unk>  recurs. Antibiotics are usually not needed. Without treatment the condition may remain long term. About 3 per 10,000 people per year are affected, and it occurs more often in males than females. Young adults are most commonly affected. The term<unk> " means "nest of hair". The condition was first described in 1833.
Pilonidal disease
Hidradenitis suppurativa
Cystitis glandularis
Folliculitis
Vulvar vestibulitis
Anorectal abscess
Haemolacria
Urachal cancer