Whenever i eat chicken i get a stomach ache and have to go to the bathroom. what could it be?

Sensitive: If the chicken is cooked completely you may have a sensitivity or allergy. Talk to.Your parents and your doctor about this, meanwhile avoid chicken.

Fat in chicken : Unless it's the skinless breast chicken has a lot of fat. That causes release of hormones that regulate digestion. Some people are very sensitive to this and get that kind of reaction.

Practically everyone: ...Has some food intolerance. It's common, variable, and individual and may even include such innocuous ingestants as water. Reference: elaine shimberg, "relief from ibs". In your case, if chicken upsets you, don't eat it, or change the method of preparation and try again.