Kidney cysts in children may be caused by congenital factors and acquired infections, and appropriate treatment can be chosen according to the size of the kidney cysts. Some children with kidney cysts may be related to genetic factors or caused by medication during pregnancy, or may be caused by upstream infections in the urinary system or infections in the kidneys themselves. Generally speaking, if the kidney cyst is less than 5cm, regular observation is enough, but if there is infection in the urinary system, antibiotics such as azithromycin and cephalosporin should be used for treatment; if the kidney cyst is larger than 5cm, it should be treated by surgery. If there is a kidney cyst in a small child, you should seek medical treatment in time, and the relevant drugs should be used under the guidance of a doctor.