The first symptom of breast cancer most women notice is a lump or an area of thickened tissue in their breast. Most lumps (90%) are not cancerous, but it is always best to have them checked by your doctor.
See your doctor if you notice any of the following:
- a lump or area of thickened tissue in either breast
- a change in the size or shape of one or both breasts
- discharge from either of your nipples (which may be streaked with blood)
- a lump or swelling in either of your armpits
- dimpling on the skin of your breasts
- a rash on or around your nipple
- a change in the appearance of your nipple, such as becoming sunken into your breast
- pain in either of your breasts or armpits not related to your period
Learn more about how to be breast cancer aware.
Last reviewed: July 2018