My daughter is seven and a half years old. She is suffering from tonsillitis for five years. During every month, she takes antibiotics with Paracetamol. Now, she is having swelling in her knees for the past five months, and sometimes, it gets migrated from one knee to another with little fever. We are confused. Kindly suggest the doctor to be consulted for this issue. She has an ESR of 26 mm/hr, lymphocytes of 52 percent, and hemoglobin of 10.5 g/dL. Please advice. Currently, she is taking Penicillin injection 6 lakh units every two weeks.