Thanks for your question on HCM. By your description and history, I think you are having inguinal hernia. It is protrusion of bowel due to lax abdominal wall muscle. Normally on coughing, strenuous exercise or heavy weight lifting, abdominal pressure rises and bowel loops can protrude but abdominal wall muscle prevent too much protrusion. But if these muscles are weakened, bowel loops can protrude and gives feeling of swelling. So get done ultrasound examination of abdomen. If hernia is present then surgery is the only cure. You should avoid smoking, coughing, heaweightei, strenuous exercise, constipation etc. Consult surgeon and discuss all these.