The main causes of sperm reduction in men are the following: 1. Hot weather High temperatures in summer and autumn reduce sperm quality. Heat radiation, sauna, tight underwear and other high-temperature factors can also cause the body temperature to rise, inducing sperm cell apoptosis and reduced function or disappearance. 2, environmental pollution Environmental hormones interfere with male hormones. Environmental hormones similar to female hormones discharged into the environment during human production activities, such as car exhaust and industrial waste gas, can interfere with male hormones, leading to endocrine imbalance, genital deformities, reduced sperm count, reproductive disorders and increased incidence of cancer, etc. 3, bad habits Excessive smoking and alcohol diet is not damaged sperm. Modern medicine believes that the causes of spermatozoa include endocrine disorders, obstruction of the vas deferens, excessive smoking and alcohol, dietary disorders, environmental pollution, work stress, etc. Chinese medicine believes that the main cause of spermatozoa is kidney deficiency, blood deficiency sperm production less, excessive indulgence, drunkenness, heat burning consumes more sperm, qi stagnation and blood stasis, damp heat stasis blocking the sperm channel blockage.