ocr: Resident and Staff Physician Patiant Education Chart Breast Self-Examination: Step4 4. Start on the outside of your breast (near your left armpit) and, using a smal circular motion, examine around the rim. You may feel a - firm ridge along the lower edge, but this tos is normal. Reprinted with permissionfrom Resident and Staff Physician (c)1991-92, 19931 by Romaine Pierson Publishers, Inc.