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:
What is Hashimoto thyroiditis?
In Hashimoto thyroiditis, your body's immune system Overview of the Immune System The immune system is your body's defense system. It helps protect you from illness and infection. The immune system's job is to attack things that don’t belong in your body, including: Germs... read more mistakenly attacks your thyroid. This type of disease is called an autoimmune disease Autoimmune Diseases "Auto" is a medical term for "self." The immune system is your body's defense system. It helps protect you from illness and infection. The immune system usually attacks invading bacteria, viruses... read more .
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Your thyroid gland gets bigger and stops making enough hormones (hypothyroidism Hypothyroidism 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... read more )
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People with hypothyroidism usually feel tired and get cold easily
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If you get hypothyroidism, you will need to take thyroid hormone pills for the rest of your life
What causes Hashimoto thyroiditis?
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 Rheumatoid Arthritis (RA) Arthritis is a group of diseases that makes your joints hurt, swell up, and turn red. There are many different types of arthritis. RA is a type of arthritis in which your body's immune system... read more 
.
What are the symptoms of Hashimoto thyroiditis?
Early on, you may have no symptoms, or you may notice:
If your thyroid stops making enough hormones, you get symptoms of hypothyroidism What are the symptoms of hypothyroidism? 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... read more , such as:
How can doctors tell if I have Hashimoto thyroiditis?
Doctors will do:
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Thyroid function tests How do doctors test your thyroid gland? Your thyroid is a gland below the Adam’s apple in the front of your neck. Glands make and release hormones. Hormones stimulate other cells or tissues into action. The thyroid makes thyroid hormones... read more , including blood tests and imaging tests of your thyroid gland
Blood tests may also check for antibodies What are the main parts of the immune system? The immune system is your body's defense system. It helps protect you from illness and infection. The immune system's job is to attack things that don’t belong in your body, including: Germs... read more to your thyroid. Doctors will usually also do an ultrasound of your thyroid.
