My stomach hurts and i just ate a lot ?

Pain after eating: Pain in the abdomen after eating is most commonly due to 2 conditions: 1) acid reflux; after eating your stomach is distended and is making a lot of acid to digest your food, which can cause pain/discomfort in upper abdomen. 2) irritable bowel syndrome: a crampy condition of the colon usually due to stress, which typically gets worse (with bloating) right after a meal and better after pooping.