<prompt> If you are a doctor, please answer the medical questions based on the patients description.having stomach pain all day every day with food or without This has come on for a long time and is getting worse day by day if sitting it hurts and if I stand and move around it will ease The pain will go to center of chest When sleeping I am ok till about the last hour then I wake with pain in middle of my back I have gained 30 lbs in 8 months for no reason  <response>: Hi. Pain for no obvious reason and so much weight gain has to be investigated. I would advise :CT scan of the chest and the abdomen. Upper GI endoscopy. IT is possible that there may be a rare tumor of the supra-renal glands or so which can cause similar problems. Another possibility is having a lower lung or pleura problem, although the weight gain is not in line with this. A though history taking and physical examination can give your Physician an idea about probable diagnosis and further investigations of blood, urine and stool. This will lead to a proper diagnosis and treatment. 