High body temperature is a violation of thermoregulation, in which the temperature rises above 37 ° C. The symptom is accompanied by headaches, aching muscles, severe weakness, and malaise. Fever often occurs with infectious diseases, but fever may also have a non-infectious origin - endocrine and autoimmune diseases, tumors. Extensive laboratory tests and imaging techniques are performed to determine the cause of hyperthermia. Antipyretics and physical cooling methods usually help bring down the temperature quickly.