Sponge kidney is most contraindicated by the increase in hydronephrosis, more and more stones in the kidney, fever, and further decline in kidney function, because sponge kidney is a genetic and development-related congenital disease, this disease is mainly the renal cone near the renal papillae of the collecting ducts cystic dilatation, these cystic dilatation will lead to the easy formation of kidney stones, when the formation of kidney stones, hydronephrosis will be further aggravated, hydronephrosis aggravated, it may lead to kidney function Further damage may occur. For patients with spongy kidneys, regular ultrasound examinations should be done to determine whether the number of stones is increasing and whether the degree of hydronephrosis is worsening. It is recommended to review the ultrasound every six months to detect small stones at an early stage and to break them up and discharge them through extracorporeal shock wave lithotripsy to avoid the occurrence of infection.