The male urethra can see the mucus may be physiological reasons, urethritis, prostatitis and other reasons lead to. 1. Physiological reasons: men in the state of sexual excitement or sexual stimulation, may lead to prostate secretion from the urethra, the color is often transparent, in the sexual life after ejaculation of a short period of time, the urethra can be seen to see mucus secretion. 2. Urethritis: When the urethra is infected by pathogenic microorganisms, such as mycoplasma chlamydia or trichomonas infection, it may lead to transparent secretions or purulent secretions from the urethra, causing mucus to be seen at the urethral opening of the male urethra, accompanied by urethral itching, urethral tingling and other symptoms. 3. Prostatitis: when the prostate is infected by external pathogenic bacteria or aseptic prostate inflammation, it will easily lead to an increase in prostate secretion, along with the urethra overflow, causing men to have a transparent secretion, the urethra can be seen mucus phenomenon. Men can see mucus in the urethra to rule out physiological causes, should go to the hospital in a timely manner, after a clear diagnosis of the cause of the disease, under the guidance of the doctor to give appropriate treatment and treatment.