Heat associated Diseases

General or Other | General Practice | Heat associated Diseases (Symptom)


A heat-related illness is a medical condition that may occur as a result of heat exposure. Even short periods of high temperatures can cause serious health problems. Heat-related illness encompasses a spectrum of conditions that range from minor illnesses to life-threatening medical emergencies. There are several heat-related illnesses, including heat stroke, heat exhaustion, heat cramps, heat syncope (fainting), and heat rash.


A healthy body temperature is maintained by the nervous system. As the body temperature increases, the body tries to maintain its normal temperature by transferring heat. Sweating and blood flow to the skin (thermoregulation) help keeping a person's body cool. A heat-related illness occurs when the body can no longer transfer enough heat to keep a person cool.

A high body temperature (hyperthermia) can develop rapidly in extremely hot environments, such as when a child is left in a car in the summer heat. Hot temperatures can also build up in small spaces where the ventilation is poor, such as attics or boiler rooms. People working in these environments may quickly develop hyperthermia.

A person with symptoms including headache, nausea, and fatigue after exposure to heat probably has some measure of a heat-related illness. It is important to recognize the difference between the very serious condition known as heat stroke and other heat-related illnesses.