Men who have obstruction of the urethra, such as prostatic hyperplasia or posterior urethral valves, and urethral stricture, after urination, because the urethra closes more slowly and the closing pressure is unstable, it will lead to the gradual discharge of urine in the residual urethra, you can use toilet paper for local wiping at the urethral orifice to keep the glans locally dry and prevent the situation of bacterial infection. If a woman urinates after urination, urine will flow to the low hanging part due to the physiological structure. This time you can use toilet paper to wipe, but you should pay attention to the direction of wiping, because the female urethral opening is close to the vaginal opening and the anus, in this case if you wipe through the direction of the anus to the direction of the urethra, it is easy to bring the local bacteria of the anus to the urethral opening, resulting in retrograde infection and inflammation of the urinary tract system. If wiping is to be done, it should be done in the direction of the urethra towards the anus. So if a woman has localized urine residue after urination, she can wipe, but pay attention to the direction of wiping, from the urethra to the direction of the anus.