Medically reviewed by Susan Bard, MD Boils are painful, pus-filled, and are caused by infections like Staphylococcus aureus.Cysts are painless, non-infectious growths filled with keratin or other ...

Medically reviewed by Cordelia Nwankwo, MD Breast cysts are common, harmless, and often feel like round, movable lumps in your breast.To diagnose a breast cyst, get a mammogram or ultrasound to check ...

Dear Dr. K: I have small white bumps on my eyelids that drive me crazy. They don't hurt, but they look awful. A doctor told me they are meibomian cysts. He said they are harmless, but if I want to get ...

Pilonidal cysts occur when hair and debris collect in the cleft above the buttocks, causing pain, swelling, and pus discharge.