Semen is composed of sperm and seminal plasma. Sperm count only accounts for a very small portion, with over 90% being seminal plasma. Seminal plasma is secreted by accessory gonads such as prostate, seminal vesicle, Bulbourethral gland gland, and paraurethral gland. The main component is water, as well as fat, protein particles, pigment particles, lecithin bodies, enzymes, fructose and other components. The color of semen is determined by the components that make up it.
The semen of a normal person is grayish white or slightly yellowish brown. If abstinence is prolonged, the color may become yellowish due to changes in physical and chemical properties. This is all normal. Abnormal semen includes: the semen is milky white or slightly yellowish green, indicating inflammation in the reproductive tract, which is likely a purulent infection of the prostate and seminal vesicles. The red color of semen indicates the presence of red blood cells, commonly referred to as "blood semen". Hemospermia is mostly caused by seminal vesiculitis or Prostatitis. This type of blood semen caused by inflammation is mostly light red in color. If a small blood vessel ruptures due to vascular malformation, the blood semen appears bright red and blood clots can be seen. Abnormal semen color is not terrible. Once the cause is found and Symptomatic treatment is given, the color can return to normal.