The color of normal semen is usually milky white or off-white, while the color of dead semen is not specific, and can be milky white, off-white or yellowish translucent. Necrosis is a relatively common male disease and a common cause of male infertility. The color of the semen is not the only way to determine whether or not the semen is dead, but should be determined by a semen test. Necrosis is more commonly caused by infections of the reproductive system or varicocele. It is recommended to go to a regular hospital to do semen analysis or semen routine examination, which will help to further clarify the condition, identify the cause of the disease and then treat the symptoms.