I am disabled and have to sit in a wheel chair all the time. I have been getting alot of discomfort in my lower stomach. I feel like my belly has gown during the last few years. I am 62 years old. I have been in a wheelchair for 3 years. Before I was in the wheelchair I weighed 100 lbs. Now I weigh 118 lbs. i eat very small meals. Does my stomach hurt because of gaining weigh or from sitting too long? Please answer. :-(