Feeling cold, often quite intensely, is common among individuals with an improperly functioning thyroid. The thyroid is referred to as the body's thermostat because it plays a key role in regulating temperature.
Those suffering from hypothyroidism or Hashimoto's disease tend to have a reduced tolerance for colds, and their body temperature is often lower than standard.
Feeling cold can be one of the first signs that the thyroid is not functioning correctly.