Thyroid Disease Primer: A Guide to Better Health Thyroid disease is a common endocrine disorder that affects millions of Americans. The thyroid gland, located at the base of the neck, produces hormones (T3 and T4) that regulate metabolism, energy, and body temperature. When thyroid hormone levels are too high or too low, it can lead to conditions that can significantly impact your overall health. AFC Urgent Care Worcester is here to help residents recognize the ...