They can vary in size. Lipomas consist of fatty tissue and are commonly found elsewhere in the body. Fibroadenomas , single solid tumors, appear most often in young women. They occur twice as often in African American women as in others. These breast lumps are firm, rubbery, movable, often oval-shaped, and usually painless.
Papillomas are small, wart-like growths in the lining of a mammary duct near the nipple.
These can produce a bloody discharge of the nipple. Both conditions can appear as lumps. Sometimes the skin around these areas appears red or bruised. No evidence exists that traumas can cause breast cancer. There are other, not as common benign breast lumps caused by a variety of breast problems such as sclerosing adenosis, etc.