There are many bad habits and life factors that can damage male reproductive health, easily cause male infertility and sexual dysfunction, known as the male reproductive health “killer”. Male friends should pay attention to prevent these “killers”. 1, stay up late and sleep deprivation Stay up late and sleep deprivation, has become the number one killer of male reproductive health. Because the production and development of sperm is mainly carried out at night, staying up late can lead to sperm production dysfunction, resulting in a decrease in the number of sperm, poor vitality, increased malformation rate and DNA fragmentation rate, which can easily cause male infertility and female miscarriage. In addition, people who often stay up late for a long time in a state of stress are prone to hypertension, cardiovascular diseases, neurasthenia, malignant tumors, depression and other diseases. Night sleep enables the body’s organs to rest and repair themselves, and sleeping during the day only helps to restore energy and cannot compensate for the physical damage caused by staying up late. To avoid staying up late, men should go to bed before 11 p.m. to ensure that the 8 hours of effective sleep from 11 p.m. to 7 a.m. 2, smoking Smoking can cause a reduction in the number of sperm, sperm cell membranes and DNA damage, long-term smoking or inhalation of second-hand smoke is likely to cause male infertility, female miscarriage and fetal abnormalities. Smoking damages the vascular endothelium and can easily cause erectile dysfunction (impotence). It is best for men not to smoke and pay attention to avoid secondhand smoke. 3, sedentary Long periods of sitting or cycling and other sedentary behavior can cause poor blood circulation to the male reproductive organs (testes, epididymis, prostate and seminal vesicle glands), resulting in a decline in the function of the male reproductive organs, which may cause infertility and sexual dysfunction. The sedentary male is susceptible to chronic prostatitis and epididymitis, which can also cause the testicular temperature to rise and seriously damage the sperm production function of the testicles, all of which can lead to a decrease in sperm quality. It is recommended that sedentary men stand up at least every half hour and move around for a while. 4, excessive drinking alcohol excessive drinking alcohol on the male reproductive health damage is great, will cause male fertility decline, induce chronic prostatitis, cause sexual dysfunction. The actual fact that excessive alcohol consumption can damage the reproductive endocrine function, resulting in a decrease in biologically active androgens and a relative increase in estrogen, can easily cause impotence and low libido, and even testicular atrophy. The high alcohol concentration of white wine and foreign wine can affect the production and maturation of sperm, leading to a decrease in sperm quality; and beer contains a substance that weakens the fertilization ability of sperm, which can also cause a decrease in male fertility. Men should avoid long-term excessive alcohol consumption. 5, high temperature environment Sperm are afraid of heat and not cold, the testes need to generate sperm the right temperature than the body temperature is 1-2 degrees lower (35.6 ℃ ~ 36 ℃, the temperature exceeds 37 ℃ will cause damage to sperm). Some habits, such as using a laptop computer directly on your legs, the heat generated by the body will raise the temperature around the testicles; wearing tight-fitting pants such as jeans will make the scrotum cling to the nearby skin, preventing the heat from radiating and raising the temperature around the testicles; acts such as soaking in hot springs and saunas, and working in hot environments such as kitchens and boiler rooms will put the testicles in a hot environment; all of these will damage the spermatogenic function of the testes, causing a decrease in the quantity and quality of sperm and causing male infertility. The male should try to avoid the above habits and high temperature environment. 6, electromagnetic radiation Microwave ovens, cell phones, computers and other devices generated by electromagnetic radiation damage to the male reproductive system and immune system. Excessive exposure to electromagnetic radiation can cause disruption of male hormone secretion, decreased sperm quality and damage to sperm DNA, which may cause impotence, male infertility and female miscarriage. It is recommended not to put cell phones and computers too close to the scrotum, and not to stay too long near WiFi transmitters, microwave ovens, electromagnetic wave transmission towers, high-voltage substations, radar stations and other equipment with strong electromagnetic radiation. 7, radiation, toxic chemicals Radiation, organic solvents (benzene, carbon disulfide and formaldehyde, etc.), heavy metals (lead, mercury, aluminum, copper, cadmium, manganese, nickel, chromium, arsenic, etc.) and other toxic substances can cause a decrease in the number and vitality of sperm, an increase in the rate of malformation and DNA fragmentation, causing infertility. Therefore, welders, battery factory workers, printers, painters, renovation workers and construction workers are high-risk occupations that can easily damage reproductive health.