What are the main symptoms of thyroid dysfunction disorders?

HOT OR COLD: Hyperthyroidism speeds metabolism, patient is alwas hot. Cardiac arrythmias such as atrial fibrillation can occur. Hypothyroidism slows metabolism, patient is alwas cold.

Too hot or not?: Since your thyroid controls so many functions of your body, the symptoms vary greatly and depend on whether your thyroid is too active or not active enough. Think about all those body functions that you don't consciously control - breathing, heart rate, metabolism, temperature, etc - any and all of these can be affected by thyroid problems!