A painful bump on or around the ear may be a boil, which occurs when a bacterial skin infection develops in a hair follicle or oil gland. Over time, pus collects in the lump. Boil sometimes go away, ...

Boils and cysts are two types of growths on the body. Also known as furuncles, boils are pockets of pus (a creamy, white substance) on the skin caused by bacteria infecting hair follicles.

A hump on the back of the neck, or top of the spine, can have various causes. These causes may include kyphosis, osteoporosis, muscle knots, and cysts. A person may refer to the hump on the back of ...