An expert from Shantou Urology Hospital said: After urinating, some mucus flows out of the urethra, which is a phenomenon that the urethra turns white, which may be urethritis or prostatitis. When men are sexually excited, the penis will erect, and the prostate will secrete some prostatic fluid to lubricate the urethra. There is mucus in male urethral orifice for semen to pass easily during ejaculation, and some of it will flow out of urethral orifice. After the penis becomes soft, the prostatic fluid originally in the urethra also flows out of the body. There is mucus in male urethral orifice, as long as it is transparent, there is no problem. If the color changes, you should go to the hospital for examination. When he is sexually excited but does not ejaculate, there is mucus in the male urethral orifice, and a small amount of clear and viscous liquid can flow out from the male urethral orifice. This is neither semen nor prostatic fluid, but secretion of urethral gland, which may be the "pioneer" of semen and lubrication first. Enuresis and whitening are two completely different things. According to the different ways of discharge, nocturnal emission generally needs ejaculation; White water droplets often overflow unconsciously before and after urination or defecation. One of the symptoms of prostatitis is sexual and reproductive symptoms: a little thin, milky, watery or viscous secretion flows out of the urethral orifice in the morning or during defecation, or accompanied by nocturnal emission, premature ejaculation, hemospermia, ejaculation disorder and decreased libido. The mucus in male urethral orifice belongs to prostatic fluid, which is the same as that secreted during erection. If it exists at ordinary times, it is necessary to consider whether it is prostatitis. Shantou Urology Hospital is the first modern andrology hospital in Shantou officially approved by Shantou Municipal Health Bureau. The hospital has strong cooperation and technical exchanges with top international scientific research institutions such as American Sexology Research Institute, Pfizer, Japanese Pine Society, France Meria, and many domestic professional medical institutions. Invested huge sums of money to introduce high-precision andrology diagnosis and treatment equipment at home and abroad, and hired a large number of senior andrology medical experts to devote themselves to the research and treatment of andrology diseases, adhering to the strict and realistic scientific attitude and the purpose of honesty and perfection. In Shantou, we took the lead in setting up six medical areas, including prostate disease area, physiological dysfunction area, urogenital tract infection area, reproductive plastic surgery area, infertility area and urolithiasis area, which are integrated with prevention, health care, treatment, scientific research and rehabilitation, and truly achieve "specialist, special disease and special treatment".