what cause bump in the body
Cysts, lumps and bumps. Sometimes lumps, bumps, cysts and swellings appear under the skin. These are usually harmless, but sometimes need to be checked by a doctor. The most common cause of skin lumps and bumps include: 1  Skin cysts. 2  Cherry angioma. 3  Dermatofibromas. 4  Epidermoid cysts. 5  Folliculitis. 6  Keratoacanthoma. 7  Keratosis pilaris. 8  Lipomas.