Moderate hydronephrosis of kidney stones can usually be treated by drugs, extracorporeal lithotripsy and surgery. 1. Drugs: usually due to long-term too little water, metabolic abnormalities, urinary tract obstruction and other factors, leading to the formation of stones in the urine components, deposited in the kidneys, when the kidney stones stuck in the neck of the kidneys, after the urine is not discharged, it will cause hydrocele, and may be abdominal pain, renal colic and other symptoms. If the stone is small, you can use Tamsulosin, sodium bicarbonate and other drugs under the guidance of the doctor for treatment, and after the stone is discharged, the fluid retention will usually be relieved naturally. 2. Extracorporeal lithotripsy: If the effect of drug treatment is poor, you can go to the hospital through the extracorporeal shock wave lithotripsy treatment, after the removal of stones, the fluid will gradually disappear. 3. Surgery: If the stone is large and there is moderate fluid retention, it can be treated by ureteroscopic lithotripsy and percutaneous nephrolithotripsy. Patients with kidney stones and moderate hydronephrosis should seek medical treatment in time to avoid delaying the condition and affecting kidney function. Usually pay attention to reasonable diet, and strive for early recovery.