Interdigital cysts are firm, raised subcutaneous inflammatory ... The surrounding inflammation of the skin and subcutaneous tissue is due to a foreign-body reaction to the keratin and hair.

Ovarian cysts are fluid-filled pockets in or on one of the ovaries. They are a common occurrence among women, especially in ...

Red, raised bumps, accompanied by skin darkening is what ingrown hair cysts look like. These can be infected, and pus-filled, ...