Body heat but not fever is common in physiological reasons, such as after strenuous exercise, eating beef and mutton and other foods, there will be body heat; also seen in pathological reasons, such as hyperthyroidism, endocrine disorders, and so on. 1. Physiological reasons, after strenuous exercise, produce a lot of heat, there will be fever, but the body temperature is normal; eating beef, mutton and other foods, the body will produce a lot of heat, there will also be fever but not fever, then drink more water, eat more fresh vegetables and fruits, to help the body dissipate heat. 2. Pathological causes, such as hyperthyroidism, the body’s basal metabolic rate increases, heat production increases, mostly manifested as fever, excessive sweating, panic, emaciation, etc., this time to go to the hospital, under the guidance of the physician medication. In addition, when endocrine disorders, there will be chest tightness, dizziness, and also body heat but not fever. When there is a fever but not fever, you can first change the lifestyle habits, light diet, if not relieved, to the hospital in a timely manner.