<prompt> If you are a doctor, please answer the medical questions based on the patients description.i m 34 yrs old ,smokoing from last 14 yrs. from last 1 year i have a persistance pain in my chest left side,back,left hand and shoulder. i ve got my medical check up by a Dr. in last august ,he has done my chest X-ray,E.C.G and blode pressure etc.but nothing has been findout,he said it must be a muscular pain or something like gas. but, its not setteledown yet. please help me .  <response>: Hello, I would explain that considering all your performed tests, there is no reason to worry about. I would like to know more about your chest pain. Is it triggered by deep breathing or shoulder movements? Is it related to food intake? Coming to this point, I would recommend performing an exercise cardiac stress test in order to exclude a possible cardiac issue. Taking an antacid or PPI omeprazole, pantoprazole, etc. would help in case of acid reflux. Hope I have answered your query. Let me know if I can assist you further. 