###Human: Do pain under arm pits and in knee after sex indicate HIV? ###Assistant: Hi. I have read your query in detail. Early symptoms of HIV (flu like symptoms) usually appear after two weeks of HIV infection. The symptoms of swollen lymph nodes, fever, pain behind ears or legs can be no way attributed to the exposure you have had. These could be due to anxiety or some other cause. You can take tablet Paracetamol 500 mg as per your need. If these symptoms persist, you can visit a general physician. Also, I would suggest you to repeat fourth generation HIV after four to six weeks of exposure.