<s>[INST] This evening as I was walking downstairs I suddenly got bad stomach pains and had to vomit.  I produced a lot of it over a couple of hours. All of my vomit was bright yellow (so its bile, maybe). I am concerned because all I have eaten today were a few glases each of apple and orange juice so I dont know why I am feeling so sick. Also typically if I have a stomach ache I feel better after I vomit, but this time the pain remains.  What should I do? [/INST] Hi. Thanks for your query and an elucidated history. The pain in abdomen all of a sudden which is relieved by vomiting can be due to the following reasons:-Gastritis with outlet obstruction at the opening into the small intestine due to ulcer at the pylorus -Small intestinal obstruction when the vomit is all yellow and bile. I would advise you the following:Get an examination done by a Surgeon as physical examination reveals may diseases better than any tests known. Upper Hi Endoscopy barium studies if the obstruction is expected to be in the small intestine as the endoscope reaches only the first part of the duodenum. Get started on Risperidone and Sanitizing. Take antacid get. Soft bland diet IF no relief, further investigations as already advised. </s>