Hi doctors, where does severe bowel gas/distension come from ? does it come from air/food/constipation ?

Bloating is caused by a combination of the air you swallow during feeds and the gas made by bacteria that feed on undigested material in your gut. Some foods likely make you gassier than others. The issue is a natural one and does not raise your risk level compared to any other person. Sometimes probiotics can crowd out gassy germs and reduce gas production.