The inability to urinate after drinking may be due to prostatitis, urinary tract infection, or temporary urinary retention after drinking. 1. Prostatitis: the stimulation of prostatitis is aggravated by drinking alcohol, resulting in congestion and edema of the prostate gland, which presses the urethra and causes the phenomenon of not being able to urinate. 2. Urinary tract infection: pathogenic microorganisms invade the body causing urinary tract infection, decreased immunity, vasodilatation, resulting in urinary incontinence. 3. Temporary urinary retention: after drinking alcohol urethra or prostate congestion, edema, may also be temporary urinary retention, is a normal physiological phenomenon, do not need special treatment; if it is a long time to urinate, you need to go to the hospital for prostate examination, catheterization or other treatment. Urinary retention after drinking alcohol may also be caused by other factors, it is recommended that patients go to the regular hospital in time for treatment. Patients should pay attention to a light diet in daily life, try to avoid alcohol, drink more water, can not hold urine, pay attention to clean private hygiene.