Hi and thanks for the query,
Fever and joint pain have many causes especially in children, and should be limited only to viral causes.
Bacterial causes could also be sought. A blood culture
should be done. Many autoimmune and inflammatory diseases could cause joint pain and fever. Rheumatoid arthritis
, Rheumatic fever
, Juvenile onset Rheumatic arthritis, serum negative Rheumatoid Arhritis, sarcoidosis
are all diagnostic possibilities that should be explored. Its too early to think you got nothing to do.
I suggest you take an appointment with a Rheumatologist
for a proper evaluation. While waiting, analgesics and non steroidal anti inflammatory drugs might be appropriate temporary measures. But anti biotics should however be avoided at this stage before meeting your physician.
Thanks and best regards,