Same here...got my temp ileo August 2010. I recall my surgeon stating that I had an adhesion in that area, will discuss with him. Throughout this time, sometimes the output does pull in the stoma area and is either painful or discomfortable. Thought it was normal but now hearing you state the same, it could be the adheasions or weight gain. I too lost 30lbs during surgery (5 weeks in hospital because of numerous complications) and have slowly gained every pound back. I'm confused, as you are, could it be adhesions or the weight gain. The appliance doesn't fit like it used to because of skin folds during this weight gain. Ask the doctor, I will too
Hope you feel better.