Heat exhaustion is a more severe type of heat stroke and a medical emergency. When the body temperature rises beyond the capacity of the body’s heat dissipation compensatory mechanisms, it can cause direct thermal damage and potentially life-threatening multi-organ dysfunction to the body. Patients usually present with dizziness, headache, pallor, profuse sweating, shortness of breath, cardiac arrhythmia, drop in blood pressure, and muscle spasms, which are commonly seen in the elderly, children, and patients with some chronic diseases. Causes of heat exhaustion include reduced heat dissipation, such as the lack of the body’s ability to adapt to the environment, long-term hot and humid environment and poor ventilation, obesity; increase in heat production, such as strenuous exercise in hot environments, strong physical labor; with too much aspirin, thyroxine and other medications; some patients suffering from central system diseases or hypothalamus dysfunction, persistent epileptic status, or suffering from endocrine disorders of the endocrine rush may also be Patients with central system disease or hypothalamic dysfunction, persistent epileptic states, or rapid endocrine disorders are also at risk for heat exhaustion. Patients with heat exhaustion need to be hospitalized as soon as possible, otherwise their lives may be in danger.