If there is no urination, it is necessary to clarify whether the patient has no desire to urinate or has a desire to urinate that cannot be excreted for symptomatic treatment.1. If the patient does not have any desire to urinate and does not urinate for more than 12h, it is necessary to consider the presence of dehydration or acute renal failure. If dehydration causes too little water, the kidneys are not filtering and no urine is produced, then intravenous saline or glucose should be given immediately, and some diuretic drugs, such as furosemide injection, should be given to promote the patient to urinate. However, if the patient is in acute renal failure, causing the kidneys to stop working and not producing urine, dialysis treatment or diuretic treatment should be given to observe whether the urine volume returns to normal. 2. If the patient has a strong desire to urinate, but the urine cannot be discharged normally, the presence of urethral obstruction, such as male prostatic hyperplasia or obstruction by stones or tumors in the urethra, is considered. If it is a prostate enlargement, it is recommended to place an indwelling catheter and then take oral medication for prostate enlargement, such as tamsulosin hydrochloride extended-release capsules or finasteride, and then remove the catheter after taking oral medication for a period of time to see if normal urination can be restored. If the obstruction is caused by stones or tumors that prevent the patient from urinating, then hospitalization for surgery is recommended.