Thanks for your query.
I will try my best to provide you with best possible professional recommendations to your questions.
Diseases which can cause low grade fever
and joint pain includes Autoimmune diseases, Dengue fever, Dermatomyositis
, Felty Syndrome, Flu, Hepatitis, Leukemia, Osteoarthritis
, Ross River virus, Scarlet fever Sindbis fever, Systemic Juvenile Rheumatoid Arthritis
, Typhoid fever, Viral diseases.
I advice you to do certain tests which include CBC and widal to rule out typhoid and to find out any signs of infection by performing blood test.
Yet again, I do hope that you have found something helpful and I will be glad to answer any further query.