Causes of fainting on heating include dehydration, heat stroke, low blood pressure and ischemic cerebrovascular disease.
1. Dehydration: When the surrounding temperature is high, the human body may sweat a lot, which may lead to dehydration. At this time, the circulating blood volume of the human body decreases, and the blood supply to the brain is insufficient, which is manifested as the symptom of fainting on heat.
2. Heatstroke: If the patient is under high temperature for a long time, it may lead to heatstroke, which is manifested as dizziness in the heat, accompanied by symptoms such as pale or flushed face, rapid heart rate, thirst, and so on.
3. Hypotension: due to the high temperature of the body surface and the expansion of the body’s capillaries, may lead to low blood pressure, manifested as a hot dizziness and other symptoms.
4. Ischemic cerebrovascular disease: If the patient has a past history of cerebrovascular disease, cerebral blood flow is reduced due to narrowing of cerebral blood vessels. When the external environment changes, it is possible to further aggravate the situation of insufficient blood supply, and the symptom of dizziness on heat may occur.
Fainting on heating may also be caused by other reasons, and it is recommended that the patient seek timely medical treatment under the guidance of the doctor.