<s>[INST] My father is 71 years old . For few months now he has been accumulating yellowish fluid in his shoulder. He lives abroad. So far doctors have tried meds and drawing the fluid back down with needle but condition comes back. What are the possible reasons for the condition? [/INST] Hello, This condition could be related to arthritis (local inflammation), due to chronic degerations of the joint. I would recommend taking ibuprofen against inflammation and performing some tests (uric acid plasma levels, inflammation tests). Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr. Ilir Sharka </s>