When your thyroid doesn’t produce enough hormone, it can lead to a condition known as hypothyroidism. Symptoms of hypothyroidism include feeling tired, being sensitive to cold, developing a hoarse voice and slowed speech, a decrease in pulse rate, developing coarse scaly skin and thicker hair, numbness in the hands and fingers, constipation, weight gain, headaches, confusion, depression, and signs of dementia.
University of Maryland Medical Center, September 2015