Breast Self-Examination
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How to Examine Your Breasts

Step 3: Lying flat on your back
When you reach the nipple, hold your fingers in place, roll back into a position flat on your back, and place the arm on the side you are examining at a right angle. Continue your strips until you do one right down the center of your chest over the breastbone. Finally do two or three horizontal strips along the upper boundary of your breast tissue, starting along the collarbone.