A painful lump in the breast can have several causes, such as an abscess, cyst, bruise, or fat necrosis after a blow or injury to the breast. Breast cancer can also cause a painful breast lump, although this is less common.
Other symptoms may include breast swelling, changes in breast shape, nipple discharge, warmth in the area, or skin changes over the lump. These signs can vary depending on the cause.
Any suspected breast lump should be checked by a doctor, especially if it is painful, growing, or occurs with other symptoms. Identifying the cause is important so the most appropriate treatment can be recommended.