Hello, Welcome to Health Care Magic. Thanks for writing. I am Dr.Saddiq ul Abidin. I have read your question completely, I understand your concern and will try to help you in best way possible. Normally generalized body aches are associated with majority if febrile illnesses, but polyarthralgias (involvement of multiple joints) is suggestive of many other possibilities which need to be ruled out. Many rheumatological diseases can present themselves, with such pattern and mostly their screening tests are ESR or CRP. If they are found to be raised then further evaluation with ANA, anticcp, RA factor or other specific antibodies is among few of the usual next steps of evaluation. Many viral illnesses may present with such prodromal symptoms. You also need to rule out involvement of heart, as some diseases present with joint pains and fever and may also involve heart valves. For such, Blood cultures and a 2D ECHO after a detailed auscultation of heart by your doctor would be appropriate, if symptoms worsen. RFTs would essentially rule out any such disorder which involves kidneys. Uric acid levels could also be included as a part of workup, if all others are not suggestive. In any case, you need to visit your doctor, if symptoms persist, for a detailed check up and labs screening. But before visiting i would recommend you to do a fever charting on a mercury thermometer to confirm, is it feverish feeling? or proper febrile illness?, because that would be important for your doctor to know. Hoping you a speedy recovery. I hope this answered your question.If you have more queries I am happy to answer. Otherwise rate before closing the discussion Regrads. Dr.Saddiq ul Abidin M.B.B.S(Licensed Family Physician) Resident Medicine.