<s>[INST] Hello doctor, There is a constant pain that I experience in my left upper abdomen in a specific area while I am seated. Hence, I feel very uncomfortable whenever I am sitting on a chair or a couch or in the bus. I feel the pain is related to posture as the change in posture eliminates it. Hence, I feel that it is muscular in origin. There is absolutely no abdominal pain when I am standing or lying down. No pain medicines have helped me so far. I am sure that the cause does not lie in the digestive tract (stomach, small intestines or large intestines) as I do not have any indigestion problem. My appetite is just fine; I eat well at proper times. I received hepatitis B vaccine on my left shoulder almost four years ago. I was absolutely fine and pain-free till I received the hepatitis B vaccine. The pain started post vaccination. I have done 14 blood tests so far, including rheumatology blood tests. The results of all the 14 blood tests came back fine. I did an ultrasound, which showed hepatic steatosis and the rest of the organs were of normal appearance. What autoimmune or neurological problem can this be? [/INST] Hi. Revert back with the reports to an internal medicine physician online --> </s>