Aug 2015 laparascopic surgery for a severe hiatal hernia. 4 weeks after the surgery sudden prominent " ridge-line" running directly between sternum and navel when I flex to sit up. Surgeon said diastasis recti and surgery were unrelated - it was due to weight (5'8"). What caused this if not the surgery? New Info: Bulge is completely and exactly between two incision points on abdominal centerline. Retired military, always had/still have a gym membership -- no heavy lifting.