The fluid before ejaculation is usually prostate fluid, which will contain a small amount of sperm. Prostate fluid is a thin, milky-white fluid secreted by the prostate gland. Its secretion is mainly influenced by androgens, and it is an important component of semen, which is one of the components of seminal plasma in semen. Prior to ejaculation, a small amount of prostate fluid is usually discharged. It contains small amounts of sperm and proteins, as well as high concentrations of zinc ions, acid phosphatase, and fibrinase. Prostate fluid also promotes the formation of a fertilized egg, helps the sperm to pass through the barrier and combine with the egg cell, and also promotes the liquefaction of semen and stimulates the vitality of sperm, which has an important role in physiology. If the outflow of prostate fluid is abnormal, go to the hospital as soon as possible for examination to clarify the cause of the disease, so as not to delay the condition.