Weak spermatozoa are more common in male patients, but clinically subjective feeling is not found, only because of a period of marriage without children, want to go to the hospital for examination, semen laboratory tests found abnormal semen, found that the proportion of forward motion of sperm is less than 32%, or the total vitality of sperm is less than 40%, to find that men belong to weak sperm. Weak spermatozoa can be caused by the following factors, such as varicose veins, generally varicose veins have no symptoms, but if you stand for a long time, you will feel a little pain in the groin or testicles, which can disappear after lying down. In addition, there is also orchitis, a small organ in the posterior part of the testicle that shows cysts, nodules or pain. Weak spermatozoa are usually detected by examination and are not felt by themselves.