Drinking alcohol may cause inability to urinate because alcohol stimulates the bladder or male prostate, causing local congestion and compression of the urethra, decreased stimulation of the nervous system, alcohol causes prostate congestion and other reasons. 1. Local congestion and compression of the urethra: If a patient is unable to urinate after drinking alcohol, it may be due to alcohol stimulation of the bladder or male prostate, causing local congestion and compression of the urethra and affecting the bladder contraction, resulting in bladder weakness, leading to urination is more laborious. 2. Decrease in nervous system stimulation: After drinking alcohol, the nervous system’s response to the stimulation of urine in the bladder decreases, and paralyzes the muscles and tissues of urination, resulting in urinary inability to urinate, and some patients even experience urinary retention after drinking alcohol. 3. Alcohol leads to prostate congestion: Alcohol has the effect of making the prostate congested, so patients with prostate hyperplasia or chronic prostatitis, or try not to drink alcohol. Although a small amount of alcohol consumption some people feel that urination will be very smooth, but this is due to the metabolites of alcohol, in the urine play a mild diuretic effect, but with the increase in the amount of alcohol consumption, the prostate gland congestion is gradually aggravated, will eventually lead to more difficult urination. It is recommended that patients go to the hospital in a timely manner, under the guidance of the doctor standardized treatment.