The sudden heat and sweating of the body may be a physiological reaction of the body after strenuous exercise. After exercise, the body itself releases all kinds of heat, which needs to be expelled from the body through sweating. Sudden body fever and sweating are also common in other pathological diseases: a. cold, fever due to bacterial or viral infections can appear suddenly feverish, sweating, you can first take the body temperature, see whether the temperature has increased, and then take further treatment measures. Second, hyperthyroidism. This disease is a disease in which the body’s basal metabolic rate is increased, which can easily lead to fever on the surface of the body, resulting in sudden fever and sweating. In addition to this, hyperthyroidism also tends to lead to an enlarged thyroid gland. Third, menopause. During menopause, the level of hormone secretion in the body decreases, which can easily lead to symptoms of endocrine disorders, which affect the human nervous system and lead to increased sensitivity of peripheral nerve factors in the human body, and the patient will also experience sudden body fever and sweating.