Fully palpate the entire breast and breast area under the arm, up to the collarbone and all the way to the shoulder, to cover the outer part of the mammary gland extending in this direction.
Place your fingers straight and straight on the nipple. Look for any changes under your nipple.
Gently push the nipple inward. He should move easily.
Repeat steps 9, 10 and 11 on the other breast.