90 year old female, healthy, not overweight, physical active every day. Developing problems to defecate. Short after food intake extreme pain in lower rectum. Stool softener will produce more cramps. When Percocet administered, short after is able to produce small BM. Abdom. soft, non tend. by touch, BS adequate in all 4 quad.. Could it be a spastic bowel and if so, is medication available to relief the spasms.