Urethral flow colorless transparent discharge is considered to be prostate fluid, but also consider with urethritis, prostatitis related. 1. prostate fluid: prostate fluid is prostate secretion, mainly viscous milky white translucent thin liquid. When part of the prostate fluid is discharged, it can be manifested as colorless and transparent secretion from the urethra. 2. Urethritis: the disease is related to gonococcal infection, mycoplasma infection, patients mainly manifested with urinary frequency, urinary urgency, urinary pain, may also appear white thin liquid, can also be manifested as urethral flow colorless transparent secretion. 3. Prostatitis: mainly due to pathogen infection, and irregular sexual life, sedentary and so on belong to the triggering factors. Prostatitis can lead to colorless discharge from the urethra in some patients, and it is easy to be accompanied by frequent urination, urinary urgency, urinary pain, fever, suprapubic region pain, and so on. The urethra can also be caused by other factors, if in addition to the urethra, the body is also accompanied by other symptoms, should be timely medical examination, in order to clarify the cause of the disease and follow the doctor’s instructions. Pay attention to strengthen personal hygiene care, change and wash underwear, drink more water, urinate regularly.