Particles in semen refers to incomplete liquefaction of semen in medicine, which may be caused by diseases such as seminal vesiculitis and prostatitis. 1. Spermatitis: The cause of semen vesiculitis is mainly related to infectious factors, excessive sex, perineal injuries, alcoholism and other reasons may also induce the disease. Patients may experience symptoms such as urinary urgency, frequent urination, painful ejaculation, and discomfort in urination. Suffering from seminal vesiculitis will cause abnormal secretion of seminal vesicle glandular fluid, which affects the liquefaction of semen, and may result in the phenomenon of incomplete liquefaction of semen. 2. Prostatitis: The cause of prostatitis may be related to pathogen infection, irregular sex life, sedentary lifestyle, poor dietary habits and other factors. The patient will have fever, fatigue, urinary pain, urinary urgency, urinary frequency and other symptoms. If you have prostatitis, you will have prostate secretion disorder, which will lead to problems with the prostate fluid, thus resulting in incomplete liquefaction of semen. If the situation of incomplete semen liquefaction occurs, it is recommended that the patient go to the regular hospital for examination to clarify the cause of the disease.