Urinary urgency, frequent urination, and short urination after intercourse may be due to irritation of the urethra and lower urinary tract infections. 1. Irritation of the urethra (1) Stimulation of the male urethra During intercourse, the prostate gland of men will be congested, and because the prostate gland surrounds the proximal urethra, so the prostate gland congestion can stimulate the proximal urethra, thus causing urinary urgency, frequent urination, short urination after intercourse. (2) Female urethra stimulation The female urethra is adjacent to the vaginal opening, during intercourse, the female vagina will be stimulated, which may give the urethra a certain amount of stimulation, resulting in abnormal urination after intercourse, such as urinary urgency, frequent urination, short urination. 2. Lower urinary tract infection: If both men and women or one party do not clean their genitals before intercourse, it may cause lower urinary tract infection which is close to the physiological location of the genitals, and under the stimulation of inflammatory factors, there will be urinary urgency, frequent urination and short urination. If urinary urgency, frequent urination, short urination after coitus, you should go to the regular hospital in time to identify the cause of the disease, and under the guidance of a professional doctor to choose a suitable method of treatment.