I had viral fever 1 month ago. Since then I am having extreme joint pain specially in ankle region.The pain seems to be more in the joint of leg to ankle.It is so severe that I cannot stand on my feet and walk. Pain exists in both legs whose intensity keeps on fluctuate day by day. I had done the tests for dengue,chickenguniya, Malaria etc.All reports were normal.RA factor test and
uric acid test were also normal. Please suggest over the ailment.