causing or capable of causing death; mortal; deadly: a fatal accident; a fatal dose of poison. causing destruction, misfortune, ruin, or failure: The withdrawal of funds was fatal to the project. decisively important; fateful: The fatal day finally arrived.
Extreme cold spells may come. Submitted by Erika (not verified) on Mon, 2009-09-28 13:40. Extreme cold spells may come from bad circulation (the blood not flowing properly) or from the thyroid (low thyroid function leads to a lower body temperature).
Due to estrogen levels decreasing, hormonal and biochemical imbalances occur, according to the 34 Menopause Symptoms website. The falling estrogen levels are thought to be the cause of both hot and cold flashes. The hypothalamus, the area of the brain responsible for body temperature regulation, becomes overactive. This causes the hypothalamus to release chemicals that cause blood vessels in the skin to expand in order for heat to be emitted.