Begin with your arms at your side and then raised above your head, looking carefully for changes in the size, shape and contour of each breast. Look for puckering, dimpling, or changes in skin texture, colour or rashes. Check your nipples for any changes, such as whether they have become pulled in.
With your hand on your hip, tense and push that arm forward to make a pocket under the arm. Check this area. Repeat on the other side. Use this same method to check each breast when lying down.
With your arm resting on a firm surface, use the same circular motion to examine the underarm and side rib cage area.