The clinical manifestations of nephritis in children are highly variable, as mild cases may have no clinical manifestations. 90% of children may have a prodromal streptococcal infection in the upper respiratory tract and skin, and some may have symptoms of upper respiratory tract infection such as general malaise, decreased appetite, fever, headache, and cough, as well as gastrointestinal symptoms such as abdominal pain, nausea, vomiting, and shortness of breath or nasal bleeding. Other noticeable symptoms include edema and urinary abnormalities. About 70% of children will have diffuse edema that starts from the head and face and is non-depressed. Urinary abnormalities mainly include urinary abnormalities and voiding abnormalities. About 50%-70% of children with the disease have hematuria and also varying degrees of proteinuria, and some children may have reduced urine output. In addition, about 30%-80% of children will have increased blood pressure. In addition, as the disease becomes more severe, examination of the child’s body may reveal circulatory congestion, which may lead to shortness of breath, wet rales in the lungs, abnormal heart sounds, and an enlarged, edematous, and hardened liver. Also, hypertension tends to lead to hypertensive encephalopathy and, in severe cases, cerebral edema. Parents are advised to be more vigilant when the above symptoms are visible to the naked eye and to take their children to the hospital in a timely manner to avoid delays in treatment.