The most common sign of breast cancer is a lump or mass in the breast. Other signs include the following: change in size - one breast may have become noticeably larger or lower; nipple change - if it becomes inverted (pulled in) or changes its position or shape; rash - on or around the nipple; discharge - from one or both nipples; puckering or dimpling - around nipple; swelling - under your armpit or around your collarbone (from lymph nodes); symptoms include constant pain - in one part of your breast or in your armpit. Any change in breast tissue should be reported to a doctor or other health care expert.
More information about the signs and symptoms can be found at: