<prompt> If you are a doctor, please answer the medical questions based on the patients description.my son who is 18, weighs about 135 and is 6ft 3in started with dirahea the night before last, that subsided, and a few hours later he started with bad stomach pains, saying its like a cross between burning and stabhing. This has been going on since yesterday afternoon, and is still continuing. He has had his appendix removed almost 4 years ago. I m looking for a way to releive some of his pain.  <response>: Hi, it is most likely that he is having g i infection and needs immediate treatment with i v medicines and infusions. Please take him to emergency and get a check-up and start on treatment. If he can take oral medicines and no vomiting you can start on brake tab 1 tab 2 times after food. Vibact DS 1 tab daily. For pain demonic tab 1 tab may be given three times. Better will be to take immediate medical consultation. Hope you be all right soon 