Breast cancer does not always produce symptoms; women may have cancers that are so small they do not produce masses that can be felt or other recognizable changes in the breast. When symptoms do occur, a lump or mass in the breast is the most common symptom. Other possible symptoms include nipple discharge or redness, changes in the skin such as puckering or dimpling, and swelling of part of the breast. Certain types of cancers known as inflammatory breast cancers may produce redness and warmth of the affected breast, but these are not common symptoms of breast cancer. Breast pain is also not a typical symptom, but breast or nipple pain may occur in certain cases.