Also known as a pilonidal cyst, the condition forms when a sac of tissue fills with air or fluid in the crease of your buttocks. Pilonidal cyst, doctors say, is mostly caused by a skin infection.

DEAR DR. ROACH: I am writing because my son had a pilonidal cyst removed in March of 2010, almost three years ago. For the first six months, I kept the area clean and free of hair. After six months ...

Pilonidal cysts aren’t pleasant for those affected (Picture: Getty Images) Briefs. G-string. Hipster. Brazilian. There are many types of knickers us women can pull on at the start of the day. But ...