<human>: After I eat I get severe stomach pains, sometimes in the upper region only and it switches to the lower region or sometimes its all over. I also have diarrhea and feel very clammy and nauseous and I sometimes experience back pain, this pain can last for hours, Do you know what can cause this?
<bot>: HI. There are several causes for the symptoms you have mentioned. Let us start : the upper abdomen pain increasing with eating can be due to ulcers in the stomach and / or duodenum. Switching to lower / all regions can be suggestive an inflammatory pathology of intestine like enteritis/ IBS- irritable bowel syn Chat Doctor.  Back pain can be due to lymph node inflammation as already suggested, but would suggest me to rule out pancreatitis / gastric ulcers. So, to get a diagnosis you need to consult a Gastroenterologist and undergo upper GI endoscopy / CT scan of abdomen The proper diagnosis will lead to a very proper treatment in a guided manner...