Why is there some transparent sticky fluid that comes out when the penis is erect?

Patient's question:

Patient Gender: Male
Detailed medical condition and consultation purpose: Want to know
Duration of the current illness and persistence: Just these past few days
Current general condition: Feeling good, in good spirits, eating well
Medical history: None
Previous diagnoses

Doctor's answer:

This secretion comes from the Cowper's glands or from nearby glands. This secretion enters the urethra (the tube through which urine and semen pass through the penis), near the base of the penis. It is a normal physiological reflex.
During arousal, secretions from different organs merge in the prostate and mix together. It is speculated that even if a man does not secrete any fluid before ejaculation, his Cowper's glands will still produce it, but this fluid mixes with other components of semen during ejaculation rather than being released outside the penis in advance. Therefore, the amount of fluid released is not of particular significance, and there is no need to worry. Wishing you good health.