Children with acute nephritis, mainly due to the infection of streptococcus caused by secondary immune response caused by children with acute nephritis will be manifested in the following clinical symptoms: first, manifested as edema, suffering from nephritis will appear in different degrees of edema, initially often manifested as eyelid edema, with the progression of the disease tends to be the whole body will be edematous, and the amount of urine will be significantly less. The amount of urine will also be significantly low. Secondly, the manifestation of hematuria, acute nephritis after the occurrence of hematuria is often very obvious, light is microscopic hematuria, serious cases can see the naked eye hematuria. Finally, children’s blood pressure is often significantly elevated.