Why Do I Feel Bloated and Uncomfortable After Eating 3 Weeks Post-op Tummy Tuck?

As previously stated eat small more frequent meals. Also if not improving by 3 months post op see your surgeon to be examined and obtain a GI evaluation. Regards 

The tightening of the abdominal fascia is a part of most tummy tuck surgeries. This part of the surgery tightens the abdominal wall and increases the pressure behind the rectus muscle. There is less space for the diaphragm to descend during deep breathing which can slightly impair deep breathing in the first several weeks after surgery. The limited space also makes patients feel more full with smaller meals because the stomach organ also does not have as much space to expand into. These unusual feelings normalize with time and should not cause much alarm. Things should feel back to normal about 2-3 months after your procedure. 

What you are experiencing is quite common after tummy tuck surgery. It is probably related to the increased intra-abdominal pressure after the muscle plication;  if it becomes a major concern then a gastrointestinal workup may be  helpful.

Best wishes.