Whenever I eat out, I get stomach ache. Is this normal or is there something wrong with me?

Do you. Do you tend to overeat when you are eating out, is there specific cuisine that you are eating when eating out and not other times, is there special type of food that you eat only when eating out? Try to keep the food diary, find what is different, besides that you are eating out.

Not normal. This symptom could represent several illnesses including gallstones and irritable bowel syndrome. You should see your doctor.