<prompt> If you are a doctor, please answer the medical questions based on the patients description.i am a 14 year old girl, and after i eat something- like a toasted sandwhich i get severe stomach cramps near my bellybutton and all around mmy stomach aswell. the pain from my stomach makes my lower back hurt too,it gets so severe that i cant stop crying, and that i sometimes wake up in the middle of the night. i feel nausea aswell. i cant throw up, i dont have diahrreah but im a little bit constipated at times too. the pain goes away after hours, but returns when i eat something. is this appendicitis?  <response>: Thank you for your question.Typically, appendicitis is more of a short-term illness that does not go away and return. Chronic ongoing constipation can cause symptoms like you describe. Another possibility would include a food sensitivity like gluten intolerance. Try keeping a food diary of what you eat and when your symptoms occur. Take this to your doctor; this will allow them to see any correlation and suggest further tests or treatments. 