Nephritis is a large group of diseases that can include acute nephritis, chronic nephritis, lupus nephritis, purpura nephritis, etc. Among them, acute nephritis is the most common kidney disease in childhood. In the early stage of the disease can show more than three symptoms, more than three, there are common manifestations of hematuria, proteinuria, decreased urine volume, lid swelling, increased blood pressure: 1, hematuria: hematuria is one of the most common and main symptoms, the color of urine is usually washed water color or dark tea color; 2, proteinuria: due to the decrease in glomerular filtration function, protein enters the urine, thus producing proteinuria, the amount of urine protein can make the urine 3. decreased urine volume: due to the decrease of glomerular filtration rate due to the damage of kidney function, thus reducing the urine volume; 4. lid swelling: most children will have morning lid swelling, which may gradually develop into generalized edema in severe cases; 5. increased blood pressure: a single headache may appear, along with symptoms of dizziness, nausea, and weakness, requiring blood pressure monitoring. In addition to the typical manifestations mentioned above, some children may also show signs of irritability, shortness of breath, loss of appetite, and increased heart rate in the early stage. A few children may show serious symptoms such as terminal breathing, transient visual disturbance, severe headache, nausea, vomiting, and even convulsions and coma in the early stage. However, it is important to note that the diagnosis of nephritis should not be made by the above-mentioned manifestations alone. Children need to go to the hospital accompanied by their family members for routine urine, blood and kidney function tests, and treatment should be carried out according to the doctor’s instructions after the diagnosis is confirmed.