Hello kamiya34, In order to make sure patients are optimized for surgery, a pre-operative physical is performed for surgery clearance. This is were the gastrointestinal condition/status would be addressed. A tummy tuck is indicated for excess abdominal fat, redundant abdominal skin, protruding abdomen due to stretched out muscles, unattractive skin texture and appearance especially surrounding the belly button (stretch marks), and loss of feminine silhouette. Depending on the patient once the abdominal skin is lifted, the underlying weakened abdominal muscles are repaired if needed. A consultation is recommended with a board certified plastic surgeon to determine the desired goals and the extent of surgery that will be needed to achieve these goals.