I have an 11 yr old girl who has had a very extended tummy for over 2 years.... At first I just thought she was gaining weight, but she tumbles at a gym 4 days a week and plays soccer... Her arms and legs are no indication of obesity.... Then we have a stomach when you look at it, you think if I could pop it all air would leave. Her coach said maybe a food allergy for we eat extremely healthy... I am a lifetime member of weight watchers.... Could it be extreme gas extension?? Doctors here say just watch her eating... She eats small meals and so I am confused and hurting for her.