An abrupt widening of the blood vessels (vasodilation) to release heat, causing that intense warmth, blushing, and sweating. What Does a Hot Flash Feel Like? Duration: Usually lasts from 1 to 5 minutes.
Welcome to the (or "power surge," as many prefer).
Lower estrogen tricks your hypothalamus—the body’s "heat manager"—into believing you are overheating, even when you aren't.