Suggest Treatment For Knee Joint Pain While On Augmentin And Pentids 400

Hello sir, In July, my 10 yr.daughter complain pain in knee joint doctor suggested ASO titre test which was 680 she took augmentin for 10 days. She was ok. After 2 months again her ASO was 580, CRP 93 and ESR 40 Other test like ANA and HLAb27 was negative. She was preceded Pentid 400 for 2 months. After 40 days Her ASO is normal but complaining knee joint pain. Why pain in knee joint. Please suggest.