Familiarity makes it easier to notice any changes in the breasts from one month to another.
The best time to do a BSE is two or three days after your period ends, when your breasts are least likely to be tender or swollen. If you no longer menstruate, pick a day, such as the first day of the month, to remind yourself it is time. Stand before a mirror undressed. Inspect both breasts for anything unusual, such as any discharge from the nipples, puckering, dimpling or scaling of the skin. The next two steps are designed to emphasize any changes in the shape or contour of your breasts.