<s>[INST] I have upper back pain going thru my chest and nipples hurt. im 29 years old white male 290lbs. went to er room. had chest ex- ray everything is fine, blood work is fine and ekg is fine. dont know what is going on back it hurts. any quess what is going on. the doctors didnt have a clue what is going on. [/INST] Hello,I had gone through the case and found that it might be due to muscle spasm which causes nerve trapped.So take mild painkiller and apply muscle relaxant gel.Hope my answer will be effective for you.Thanks; </s>