Thyroiditis refers to several disorders that cause an inflammation of the thyroid, a gland located in the front of your neck below your Adam's apple. The thyroid makes hormones that control metabolism, the pace of your body's processes. Metabolism includes things like your heart rate and how quickly you burn calories.
There are several types of thyroiditis.
Since thyroiditis refers to a group of disorders rather than just one disorder, the symptoms vary.
Thyroiditis can cause slow, long-term thyroid cell damage and destruction that causes thyroid hormone levels in the blood to fall. If so, the symptoms are like those of hypothyroidism (underactive thyroid). Symptoms include the following:
Thyroiditis can cause rapid thyroid cell damage and destruction that causes thyroid hormone in the gland to leak out and increase the thyroid hormone levels in your blood. If so, it causes symptoms that are like those of hyperthyroidism (overactive thyroid). Symptoms include the following:
People who have thyroiditis can sometimes have pain in the thyroid gland (in the front of the neck).
Thyroiditis is caused by an attack on the thyroid gland. The attack causes inflammation (the body's response to injury) and damages the thyroid cells. Usually, the attack on the thyroid is due to an autoimmune disease. Normally, antibodies produced by the body's immune system help protect the body against viruses, bacteria and other foreign substances. An autoimmune disease is when your immune system produces antibodies that attack your body's tissues and/or organs.
Thyroiditis can also be caused by an infection or certain medicines.
Your doctor will perform laboratory tests to determine if you have thyroiditis, and, if so, what type of thyroiditis you have. Blood tests measure the amount of thyroid hormone in your blood and can indicate whether your thyroid is releasing too much hormone or too little. Blood tests can also show how much thyroid-stimulating hormone your pituitary gland is producing and what antibodies are present in the body.
Your doctor may also do a radioactive iodine uptake test to measure your thyroid's ability to take up iodine, a mineral that is needed to produce thyroid hormone. In some cases, a biopsy may be needed to determine what is attacking the thyroid.
Your treatment depends on what type of thyroiditis you have and what symptoms you are experiencing.
If you have symptoms of hyperthyroidism, your doctor may prescribe a medicine called a beta blocker to lower your heart rate and reduce any tremors you may be experiencing. Since the symptoms of hyperthyroidism may be temporary, your doctor may taper the dose of this medicine as your symptoms improve.
If you have symptoms of hypothyroidism, your doctor may prescribe thyroid hormone replacements to restore your body's hormone levels and shift your metabolism back to normal. It can take several tries to get the right dose of synthetic thyroid hormone. In some types of thyroiditis, the symptoms of hypothyroidism will improve over time and your doctor will slowly taper your dose of synthetic thyroid hormone.
If you have pain in your thyroid, your doctor may recommend a mild anti-inflammatory medication like aspirin or ibuprofen (one brand name: Motrin) to manage the pain. Occasionally, severe thyroid pain requires treatment with steroid therapy.
Written by familydoctor.org editorial staff