Breast cancer can have a number of symptoms, but the first noticeable symptom is usually a lump or area of thickened breast tissue. Most breast lumps aren't cancerous, but it's always best to have them checked by your doctor. You should also speak to your GP if you notice any of the following: 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 Breast pain alone isn't a symptom of breast cancer. Learn more about the symptoms of breast cancer After examining your breasts, your GP may refer you to a specialist breast cancer clinic for further tests. This might include a mammography (breast screening) or a biopsy.