How to do a Breast Self-Exam Part 1: TOUCH. Check the OUTER HALF of your right breast. Using the flat pads of your three middle fingers—not the tips—move the pads of your fingers in little circles, about the size of a dime. Start the circles in your armpit and move down to just below the bra line. Sep 9, - A breast self-exam is a check-up a woman does at home to look for changes or problems in the breast tissue. Many women feel that doing this.