I have tightness and seems some swelling just above the belly button. I have been tests that consist of gallballader, colonscopy, upper endoscopy, capsule endoscopy, cat scan, and x ray. All were negative except cat scan, and they tested for celiac disease and was negative. I am wondering if it could any of my valves in that area. I am eating lean diet but still have problems. Gas buildup. Though since taking probotiotic supplement not as much gas but still have the tenderness when I push on it? Any suggestions?