Here is the English translation of the provided text: A small amount of semen flows out when the penis is erect. What is the reason for this?

Patient's question:

Approximately 20 years, sometimes I don't know, sometimes I do.

Doctor's answer:

According to your condition, the symptoms are mainly caused by prostatitis, which falls under the category of kidney deficiency. It is recommended to nourish the kidneys, replenish essence, and strengthen the kidneys by taking Jin Suo Gu Jin Wan.