A mastectomy is a surgery to remove one or both breasts to treat or prevent breast cancer. There are several types of mastectomies including total mastectomy, modified radical mastectomy, lumpectomy, and radical mastectomy, each with different procedures for removing breast tissue and lymph nodes. Post-mastectomy exercises are performed after surgery to increase blood circulation, muscle strength, restore range of motion, and prevent stiffness; they should be done three times daily under a doctor's guidance using equipment like rubber balls and ropes.