The red color of sperm is not normal. Red sperm usually indicates the presence of hematosperm. The presence of inflammation of the prostate and seminal vesicles often indicates the presence of hemorrhagic sperm, due to the presence of inflammation of the prostate and seminal vesicles causing inflammatory oozing of blood, which increases the number of red blood cells in the semen, thus making the semen reddish in color. The color of normal sperm is off-white or milky white. The fresh semen ejaculated by men is thick and jelly-like in nature, and the volume of one ejaculation is about 2-5 ml. The semen starts to liquefy 5 minutes after ejaculation, and the semen is completely liquefied in about 20 minutes, and is transparent after liquefaction. If the semen is found to be red in color clinically, the possibility of prostatic seminal vesicle inflammation should be considered. The diagnosis can be clarified through routine semen examination and seminal vesicle ultrasound examination.