Tachyphylaxis is a worldwide difficult disease that mainly involves the central nervous system of human beings, motor neuron disease, including tachyphylaxis, whose etiology has not yet been clarified, and the characteristics of tachyphylaxis are as follows: 1. Motor neuron disease is more common in males with a male-to-female ratio of 1.5-2:1, and the incidence of tachyphylaxis in males is greater than that of females, and males aged about 40-70 years have a greater chance of suffering from the disease; 2. Although there is no typical regional or racial difference, the The relative incidence of the disease is higher in the Western Pacific population, with a family history present in 5%-10% of patients. If there is such a family history of the family, the prevalence rate will be slightly higher; 3, some patients with motor neuron disease are accompanied by gastric ulcers, the incidence rate is higher, so the disease and gastric ulcers caused by absorption disorders, lack of certain nutrient factors are also related to the statistics of some traumatic injury patients, especially spine, trunk these aspects of the trauma, the incidence rate of motor neuron disease is also to be slightly higher than the normal people; 4, occupational factors. It is now believed that long-term work with pesticides, chemical solvents, adhesives and other contact work, its incidence rate is also easy to be higher than others, these substances have neurotoxicity. Overall, the incidence of motor neuron disease is a small probability, the incidence rate is only a few hundred thousandths of a percent, 4/100,000-6/100,000, so in fact there is not more obvious difference, but still pay attention to the conditioning of the body, keep the body and mind happy, avoid excessive tension, avoid contact with toxic substances, in life, eat less MSG, chicken essence, soy sauce and other condiments with excessive glutamate content, helps the Physical health.