it could be your blood sugar and or a combination including your blood pressure and cholesterol too -"i have diabetic atomic neuropathy". i started sweating (very hot) then became cold. blood work is essential. the doctor suggested i start eating five small meals a day taking iron (daily vitamins) and krill oil.
many times after eating and resuming physical work i experience general weakness shaking excessive cold sweating. even though i have just eaten i also get very hungry especially for something sweet.