Get into the habit of examining your breasts once a month, a few days after your period ends, when your breasts are less likely to the swollen or painful because of hormonal changes.
Inspect your breast in front of the mirror with arms on your sides and then above your head. Check for any skin or shape changes. Squeeze each nipple and check for discharge – yellow or bloody fluid is something to worry about. Next, examine each breast for lumps while standing, and again while lying down. Be sure to cover the whole area of the breast by starting with the nipples and then moving outward in circles.