<s>[INST] for 2 years now my hushand has a pain that starts in his back under his left shoulder and go thru to his chest just like he is having a heart attack and sometimes down his arm.  He has had his heart checked, no blockages and problems.  As his heart doctor said he has had the million dollar check up and cant find anything wrong.  Every possible part of his body has been checked.  Can not determined what is causing the pain.  The pain is very serve just like a heart attack and a nitro wil ease the pain for a short time.  He eats nitro like candy.  Can you help???? [/INST] Hello and thank you for asking in Chat Doctor I can understand your concern You say that he had check any organ that may cause this situation, but I have some questions for you :Did he do chromatography? And if it was negative what about a fibrogastroscopy? The fact that after taking a nitro he feels better is very important for the differential diagnosis. Sometimes the problems of the stomach may cause a sharp pain in the middle of the chest. An abdominal ultrasound should do too. If I was his doctor I would strongly recommend the above examinations. According to the results than he will take the right treatment from the specialists. I wish a good health to you and your husband. Thank you Chat Doctor.  </s>