Look at your breasts with your arms at your sides while slowly rotating your upper body from side to side.
Next put your hands on your head and look for dimples or bulges in your breasts, particularly underneath.
Dimples which are equal in size and shape and occur in both breasts are normally harmless.
Then, raise your arms high above your head and look again for any changes – especially in the nipple area.
Finally, rest your palms on your hips and press down firmly while holding the shoulders back so that your chest muscles are flexed.
Check for any changes in appearance.
During each of these four steps you should rotate your upper body from side to side. By regular inspection you will see what is normal for you.