Sauna bathing is a fashionable and healthy way to relax, relaxing the whole body and eliminating fatigue after a sweat, so many people who work under pressure are quite good at it. However, medical experts warn that frequent sauna visits may be the culprit of male infertility. In Finland, the birthplace of sauna bathing, the incidence of male infertility is quite high, and this is not unrelated to the local people love sauna bathing. The temperature of the testicles is generally 3°C to 4°C lower than the human body temperature in order to produce normal sperm, and sperm have strict temperature requirements and must be below body temperature to develop normally, while the temperature of sauna baths is much higher than body temperature, which is not conducive to sperm growth, or cause sperm viability to decline too much resulting in infertility. The clinical statistics show that a significant portion of male infertility is due to higher than normal testicular temperatures. The director of Shanghai Ji’ai Genetic and Infertility Treatment Center, Professor Zhao Weipeng, reminded that for unmarried men, in addition to saunas, other factors that can raise the temperature of the testicles should be avoided, such as prolonged cycling, hot baths, sitting still, wearing tight jeans, etc. Infertility knowledge: female infertility male infertility sexual dysfunction sperm semen abnormalities ovarian infertility habitual abortion uterine infertility ejaculation disorders testicular abnormalities artificial insemination eugenics in vitro fertilization general knowledge of pregnancy and childbirth contraceptive measures sexual dysfunction. Of course, it does not mean that you should never take a sauna, but it may be a good idea to do so occasionally. If you have already given birth, you can enjoy it without worry. Sauna has a certain health effect on the human body: it can speed up blood circulation and make the muscles in all parts of the body completely relaxed, so as to eliminate fatigue and rejuvenate the spirit. At the same time, because the body repeatedly hot and cold dry steam rinse, blood vessels are constantly contracted and dilated, can achieve the effect of enhancing the elasticity of blood vessels and prevent vascular sclerosis. At the same time it arthritis, low back pain, bronchitis, neurasthenia, etc. have certain health benefits. Bathing six not 1, not bathing when hungry. People in the case of hunger, blood sugar levels are the lowest, can not guarantee the calorie consumption needed to take a bath, so, hunger when the bath is prone to dizziness, and even shock and other symptoms. 2, do not take a cold shower when sweating. Because cold water will over-stimulate the nerve endings, so that the pores suddenly contracted, prone to capillary spasms and other symptoms. Bathing when sweating after exercise, it is still advisable to use hot water. 3, bathing time should not be too long. If the summer bath more than 1 hour, more than half an hour in winter, will make the skin capillaries over-expansion, too much blood flow to the body surface, will make the brain ischemia. Cerebral vascular sclerosis, hypertension and heart disease patients and even shock phenomenon. 4, after the meal should not take a bath. Bathing after a meal is not only detrimental to the digestion of food, but also increases the burden on the heart. 5, should not use strong alkaline soap bath. Strong alkaline soap or soap such as ordinary laundry soap, will make the skin surface lose micro-acidic, reduce the skin sterilization effect. So bathing should be used boric acid bath soap and other neutral soap or bath. 6, do not bathe after drinking. Bathing after drinking, the glucose stored in the body in the bath will be consumed by physical activity, and thus the sugar content dropped significantly. At the same time, alcohol inhibits the normal activities of the liver and hinders the recovery of glucose stores in the body. Together with the bath sweating and loss of fluids, it is easy to cause a shortage of effective circulating blood volume, and lead to deficiency.