If a man cannot urinate, he needs to be treated symptomatically according to the specific cause. 1. If a urethral stone causes complete obstruction of the urethra and prevents urination, it is recommended to perform urethroscopic stone extraction surgery to completely treat the inability to urinate. 2. If a man has prostatic hyperplasia and progressive difficulty in urination develops to a certain degree and suddenly cannot urinate, it is recommended to temporarily give an indwelling catheter and give an oral tamsulosin hydrochloride extended-release capsule once a day for 5 to 7 days before removing the catheter. If the patient is older than 65 years old and the degree of hyperplasia is moderate or above, the effect of conservative drug treatment is poor, so it is recommended to perform prostate electrosurgery. 4. If the patient is suffering from urethral tumor or inflammation, causing urethral injury and complete urethral obstruction, it is recommended to perform surgical repair, surgical removal of the obstructing factor or the obstructing factor. The reason for this is that it is not possible to get rid of the obstructing factor or damage factor and restore its normal urinary function.