A person's thyroid does not work correctly. What problem would this person most likely have?

If a person's thyroid does not work correctly, they may experience hypothyroidism, characterized by symptoms such as fatigue, weight gain, sensitivity to cold, and depression due to insufficient thyroid hormone production. Alternatively, they could have hyperthyroidism, which leads to increased metabolism, weight loss, anxiety, and heat intolerance from excessive hormone production. Both conditions can significantly impact overall health and well-being.