Hi, welcome to our site. I am Dr Saumya Mittal, MD. Read your query. That is a very significant question and i appreciate your problem. I will try my best to answer your query Your symptoms are what we call pyrexia of unknown origin in medical parlance. It means that fever cause has to be found out despite investigations. I wish you had mentioned your country of stay. In India, one of the commonest infection causing fever of a long standing duration is tuberculosis. Of course since you say that the ct scan (of chest I assume), usg (of abdomen probably) are normal, the chances are low, but possibility remains. There are many other causes of fever that may be causing the fever. These symptoms may be due to a non infective cause. I could suggest a battery of tests but that is not going to be a good approach since an examination may be needed. Still I suggest you start tests with ANA. I hope this helps you. Inform the reports mentioned above/if any other so I can be of help further. Best of luck. I have given you the answer to the maximum considering the information provided. The results of the tests could further enhance my answer to you. Please do understand that some details could be extracted from a detailed history and examination. Please feel free to ask another query. I would be glad to help you. Looking forward to your return query with the details asked so that I can help you further. (If the answer has helped you, please indicate this)