Hi @canadagoose, I remember a talk by a doctor who had analysed temperature readings back in the day when diabetics were routinely admitted to hospital for stabilisation on insulin. He noted a temperature drop at about the time people became hypoglycaemic. I managed to persuade my wife, a nurse, to measure my temperature and other observations during documented hypos and yes, my temperature dropped. All my yearly thyroid tests (routine, I am not on thyroid medication) have been normal. Best Wishes on solving your mystery !