Blood in seminal emission may be related to seminal vesiculitis, seminal vesicle stones, prostatitis and other diseases. 1. Vesiculitis: mostly due to retrograde infection. Pathogenic bacteria include Staphylococcus aureus, Escherichia coli, etc., which are divided into two categories: acute and chronic seminal vesiculitis. When the pathogenic bacteria invade the seminal vesicles and lead to dilation of the mucosal capillaries, blood seepage may occur, causing blood in the seminal emission. 2. Spermatozoa stones: Chronic spermatitis, prostatitis and other diseases may cause spermatozoa stones, if there is a spermatozoa stone, it will also lead to mucosal damage to the capillary rupture, can appear spermatozoa blood phenomenon. 3. prostatitis: due to the stimulation effect of inflammation, can cause capillary expansion of the phenomenon of blood seepage, resulting in spermatozoa with blood. It is recommended to go to the hospital in time, to clarify the cause of the disease, and to carry out standardized treatment under the guidance of the doctor, so as not to delay the condition of the body to bring about adverse effects.