If you had previous breast injuries, fat cells in the breast tissue may be damaged and produce a firm, painful lump
in the breast
. If lumps are accompanied by breast
tenderness and redness, it may suggest an infection. Similarly, breast cysts can also produce firm, tender lumps in the breast that change in size and seem to appear and disappear as your monthly hormone levels change. They often cause pain before your period is due and improve when the period starts.