Today a male infertility patient is confused after a follow-up examination, less weak sperm after the initial herbal treatment has improved significantly, why today suddenly dropped so much? The reason for this is that in the past month, there have been a lot of meetings to attend, and sedentary and prolonged stilts during the meetings have become a prominent cause. For men, stretched legs can cause the local temperature of the scrotum to rise, and the result of such a long time may indeed affect the function of the testicles in the scrotum. The optimal temperature for sperm survival is about 35 degrees, which is lower than the internal temperature of the abdominal cavity (37 degrees), which is why the testicles move from the abdominal cavity to the scrotum on their own and hang outside the abdominal cavity. When the temperature rises to 37 degrees, the vitality of sperm will be greatly reduced, and keeping the testicles in such a “hot” environment for a long time may lead to infertility. Cryptorchidism (testicles stay in the abdominal cavity and do not descend to the scrotum) also causes infertility because the testicles lose their reproductive function in a “hot” environment for a long time. Therefore, newly married, unmarried and infertile men should try to avoid stretches of legs.