Children’s urine protein 3 +, eyelid swelling is not necessarily caused by kidney disease, may be physiological factors or pathological factors. 1. Physiological factors, the child if the strenuous exercise, drink less water, sweat too much, may lead to urine concentration, so there will be a transient urinary protein 3 +, eyelid swelling may be due to insufficient sleep triggering. 2. Pathological factors, children urine protein 3 +, eyelid swelling may be related to kidney disease, such as nephrotic syndrome, acute glomerulonephritis, but may also be related to other diseases, such as urinary stones, urinary system inflammation. Children with urinary protein 3 +, eyelid swelling, it is recommended to take the child to the doctor for examination in a timely manner, to exclude disease factors.