The causes of heatstroke are: 1, the ambient temperature is too high, and the heat gained by the human body from the external environment suddenly increases at this time in a windless environment; 2, the human body produces more heat, such as working for a long time or working hard for a long time, but some diseases, such as fever and hyperthyroidism, can also lead to heatstroke. 3, heat dissipation disorders, such as high environmental humidity, obesity, elderly patients, elderly people who are weak, can also be used to cause heatstroke at this time. 4, sweat gland dysfunction, some common systemic diseases, such as systemic sclerosis, scars formed after skin burns, patients with congenital sweat gland deficiency, prone to heatstroke.