Boys who stay up late occasionally usually won’t hurt their sperm, but staying up late for a long time may hurt their sperm. 1. Boys who only occasionally stay up late, the impact on the sperm is not great. But boys who stay up late frequently may hurt their sperm, which may lead to sperm deformity or even death. This is a common factor that leads to weak spermatozoa and affects male fertility. 2. If men often stay up late, it is easy to lower the body’s immunity and resistance, causing endocrine disorders. It adversely affects the secretion of hormones and reduces the secretion of hormones, which in turn leads to a decrease in the spermatogenic ability of the testes. In addition to staying up late will affect the sperm, other bad habits will also have a certain impact on the sperm of the boys, such as prolonged smoking and drinking, too frequent sex life or excessive masturbation, and so on, will also affect the quality of sperm. So some bad habits must be changed, such as quitting smoking and drinking. Daily work and rest time must be regular, and also avoid unclean sex.