The diagnostic criteria for nephrotic syndrome are a 24-hour urinary protein quantification exceeding 3.5g and plasma albumin levels below 30g/l. This is due to severe damage to the glomerular capillary network, which has many pathological types since there are various components to the glomerular capillaries, and damage to different components is referred to as different pathological types. Among children, the most common pathological types are minimal change disease and mesangial proliferative glomerulonephritis. These two types are relatively easier to treat. Most children are sensitive to steroid medication. However, treatment becomes difficult with other pathological types, such as focal segmental glomerulosclerosis, which shows less sensitivity to steroids. (Medication use should be under the guidance of a doctor.)