3rd colonoscopy, 1st time painful during and after. Why tender in abdomen. Sedation was not effective. No gas, polyps, disease. CD in remission.?

Unknown. If you are having a different reaction than before, talk to your doctor who did the scope. One thing we all worry about is an undiagnosed perforation of the colon. If you have that, you need treatment now. Tell your doctor your symptoms now.