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you have with body ache
and joint pain may be a viral fever;due to urinary infection etc so see if you have any associated symptom like cough;cold;chills;increased frequency of urine.Presently you can just take a Paracetamol
tablet every 6 hourly to get relief from fever and body pain
.If you do not get relief or the fever is continuous then you have to consult a doctor;get examined and treated.