Transparent liquid from the urethra in the morning, which may be the cause: first, male prostatitis, can appear frequent urination, urinary urgency, discomfort in the urethra, accompanied by perineal area distension and pain, pain in the lower abdomen. Its typical symptom is the phenomenon of urethral dribbling after waking up in the morning, by the urethral secretion of white transparent liquid, with a certain viscosity. It is because after prostatitis, the local prostate fluid secretion is vigorous, so the discharge of prostate fluid, sometimes hard to urinate or defecate, the urethra can also flow out of transparent mucus, need to carry out the examination of prostate fluid and prostate ultrasound, to clarify the diagnosis. Secondly, non-gonococcal urethritis is a sexually transmitted disease that spreads through unclean sexual contact. After waking up in the morning, you will find a thin white or yellow secretion from the urethra, with a relatively small amount. It can be characterized by itching of the urethra, and sometimes the discharge is dry, crusty and smears the urethra or stains the underwear. It is necessary to carry out secretion tests to look for mycoplasma and chlamydia to confirm the presence of mycoplasma and chlamydia infection.