PATHOLOGY

Detailed explanation-1: -Heat causes the blood vessels to expand (dilate), so body fluid moves into the legs by gravity, which causes low blood pressure and may result in fainting. Symptoms that could lead to heat syncope (fainting) include: Feeling faint or light-headed. Pale, cool, and moist skin.

Detailed explanation-2: -Heat syncope (fainting) is a mild form of heat illness, which results from physical exertion in a hot environment. In an effort to increase heat loss, the skin blood vessels dilate to such an extent that blood flow to the brain is reduced.