A firm, round lump in breast tissue could be a fluid-filled cyst. Typically not cancerous, breast cysts often need no treatment.
Some women have lumpy breast tissue called fibrocystic breasts, which may be more painful during certain times of the month. Fibrocystic breasts are not.
But if you find a lump in your breast, see a doctor as soon as possible. Learn the causes of breast lumps, the types, and what you should do if.