5 year old daughter has leg pain, doctors suggested Haematology &. Serology?

My daughter is 5 years old and having problem of pain in legs doctor suggest for two tests 1. Haematology 2. Serology
As per doctor result is not good esr is 44 and aso titre is 400. What i have to do for my daughter. Is there any treatment or something alse please help me


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