Breast structure
The female breast is made up of three main types of tissue - fat, connective tissue and glandular tissue. The glandular tissue contains structures called lobules, which produce breast milk if you have a baby. The lobules are connected to the nipple via a network of milk ducts.
Breast awareness
All women should be 'breast aware'. It is important for you to get to know how your breasts usually look or feel, so that you are more likely to notice any unusual changes. For example, during your monthly menstrual cycle, your breasts may feel lumpy or hard, which is completely normal. You can check your breasts in the bath or shower, or when you are getting dressed. If you are not sure what to check for you can ask your GP or nurse.
Changes to the breast
As a general guide, changes to the breast can include:
• A change in size - one breast may become noticeably larger or lower
• A nipple that has become inverted (pulled in) or changed its position or shape
• A rash on or around the nipple
• Discharge from one or both nipples
• Puckering or dimpling of the skin
• A swelling under your armpit or around your collarbone (where the lymph nodes are)
• A lump or thickening in your breast that feels different from the rest of the breast tissue
• Constant pain in one part of your breast or armpit
If you notice any change in your breast that you feel is unusual for you, tell your doctor as soon as possible - don't worry about wasting their time.
If you notice an unusual change, it doesn't mean you definitely have breast cancer - nine out of ten breast lumps are benign. In the unlikely event that you do have breast cancer, the sooner it is diagnosed, the more effective your treatment is likely to be.