It is generally normal for the penis to have semen flow when it is not erect. When the penis is erect, generally the prostate is in a state of congestion, the prostate is in a state of congestion and the prostate will secrete prostate fluid. However, it does not exclude the possibility of genital infection. If there is an increase in secretion, itching and other symptoms, it is recommended to go to the hospital for further examination to clarify the cause. The prolonged occurrence of this condition may cause kidney deficiency, impotence and premature ejaculation.