Hypothyroidism is a condition in which the body lacks sufficient thyroid hormone. Since the main purpose of thyroid hormone is to “run the body’s metabolism,” it is understandable that people with this condition will have symptoms associated with a slow metabolism. This can be caused by a previous inflammation of the thyroid gland, or inflammation due to one’s own immune system.
Symptoms include fatigue, weakness, weight gain, hair loss, cold intolerance, muscle cramps, constipation, depression, memory loss, decreased libido, etc.
Norman, James, MD, FACS, FACE. Hypothyroidism: Overview, Causes, and Symptoms. Endocrine Web. https://www.endocrineweb.com/conditions/thyroid/hypothyroidism-too-little-thyroid-hormone