<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have suffered some serious bloating that has caused discomfort and pain. I almost double in size particularly after milkshake or bread. Whenever I have fluctuated in weight it has been on the stomach only and not at all on the arms or legs not sure if relevant but could help. I then become gassy and no matter how many times I go to the toilet I dont seem to deflate.  <response>: Hi. Thanks for your query. The causes of your problems of bloating with particularly milkshake and bread indicate either intolerance or may be reaction to a content. Feeling of in evacuation may be due to severe colitis. You need:Tests of blood, stool and urine. Colonoscopy and USG This will give the diagnosis and a plan for treating you. Till then have a course of an antibiotic, metronidazole, probiotics, symptomatic and supportive treatment. 