Your thyroid is a gland below the Adam’s apple in your neck.
Your thyroid releases thyroid hormones. The hormones control how fast your body’s chemical functions work (metabolic rate). Almost every cell in your body needs thyroid hormones. Among many other things, thyroid hormones help control:
Your thyroid gland gets bigger and stops making enough hormones (hypothyroidism)
People with hypothyroidism usually feel tired and get cold easily
If you get hypothyroidism, you will need to take thyroid hormone pills for the rest of your life
Doctors don't know why your body's immune system attacks your thyroid gland. It's more common in middle-aged women and tends to run in families. Sometimes it happens in people with other autoimmune problems such as rheumatoid arthritis.
Early on, you may have no symptoms, or you may notice:
If your thyroid stops making enough hormones, you get symptoms of hypothyroidism, such as: