Stand in front of a mirror that is large enough for you to see your breasts clearly. Check each breast for anything unusual. Check the skin for puckering, dimpling, or scaliness. Look for a discharge from the nipples.
In Bed Check:
The breasts are best examined while lying down because it spreads the breast tissue evenly over the chest. Lie flat on your back, with one arm over your head and a pillow or folded towel under the shoulder. This position flattens the breast and makes it easier to check.
Feel for any unusual lump or mass under the skin. Feel the tissue by pressing your fingers in small, overlapping areas about the size of a dime. To be sure you cover the whole breast, take your time and follow a definite pattern: lines, circles, or wedges.