<unk> , also known simply as overheating, is a condition in which an individual's body temperature is elevated beyond normal due to failed thermoregulation. The person's body produces or absorbs more heat than it dissipates. When extreme temperature elevation occurs, it becomes a medical emergency requiring immediate treatment to prevent disability or death. Almost half a million deaths are recorded every year from<unk> . The most common causes include heat stroke and adverse reactions to drugs. Heat stroke is an acute temperature elevation caused by exposure to excessive heat, or combination of heat and humidity, that overwhelms the heat-regulating mechanisms of the body. The latter is a relatively rare side effect of many drugs, particularly those that affect the central nervous system.<unk><unk>  is a rare complication of some types of general anesthesia.<unk>  can also be caused by a traumatic brain injury.<unk>  differs from fever in that the body's temperature set point remains unchanged. The opposite is hypothermia, which occurs when the temperature drops below that required to maintain normal metabolism. The term is from Greek ὑπέρ, hyper, meaning "above" or "over", and θέρμος, thermos, meaning "hot". Classification== In humans,<unk>  is defined as a temperature greater than , depending on the reference used, that occurs without a change in the body's temperature set point. The normal human body temperature can be as high as in the late afternoon.<unk>  requires an elevation from the temperature that would otherwise be expected. Such elevations range from mild to extreme; body temperatures above can be life-threatening.
symptom of Malignant hyperthermia
symptom of Cardiogenic shock
symptom of Diabetic ketoacidosis
symptom of Toxic shock syndrome
symptoms of Cardiogenic shock
symptom of Hypothermia
symptoms of Toxic shock syndrome
symptom of Altitude sickness