Hello, two days ago, I noticed a small round bruise (about size of a quarter) on my lower right abdomen. I haven t run into anything, so I m not sure where it came from. Today, it s a little sore. I am roughly 100lbs overweight but I do walk 2 miles/day & sometimes more, 5-7 days a week. My father has an iliostomy bag as a result of a major intestinal surgery which required the removal of a few feet of his upper intestines. Because of his condition, I am concerned this bruise may be something thAt is NOT good. Any ideas?