Can Treatment For Hyperthyroidism Cause Hypothyroidism?

It’s not uncommon for people with hyperthyroidism to be treated with radioactive iodine or anti-thyroid medications. In some cases, this treatment can lead to temporary hypothyroidism.

What is hyperthyroidism?

Hyperthyroidism is an overactive thyroid gland. The thyroid is a small, butterfly-shaped gland in the front of your neck. It makes hormones that regulate the way your body uses energy.

The most common cause of hyperthyroidism is Graves’ disease. This is an autoimmune disorder. Autoimmune means your immune system attacks healthy cells by mistake. In Graves’ disease, antibodies attach to the thyroid stimulating hormone receptors on the surface of thyroid cells. This overstimulates the thyroid gland and causes it to make too much thyroid hormone.

Other causes of hyperthyroidism include:

– Plummer’s disease: A benign (noncancerous) tumor on the thyroid that causes it to make too much hormone
– Thyroiditis: Inflammation of the thyroid that can be caused by viral infections, certain medications, or pregnancy
– Too much iodine in the diet: Iodine is necessary for making thyroid hormone, so too much iodine can lead to hyperthyroidism
– Tumors of the pituitary gland: The pituitary gland is located at the base of the brain and controls the release of many hormones, including thyroid stimulating hormone

What is hypothyroidism?

Hypothyroidism, also known as an underactive thyroid, is a very common condition. It occurs when the thyroid gland doesn’t produce enough of the hormone thyroxine. This can cause a wide range of symptoms, including fatigue, weight gain and feeling cold.

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Hyperthyroidism, on the other hand, is when the thyroid gland produces too much of the hormone thyroxine. This can cause symptoms such as weight loss, anxiety and a rapid heart rate.

So, can treatment for hyperthyroidism cause hypothyroidism? The answer is yes, it is possible. This is because when the thyroid gland is destroyed or removed (as part of treatment for hyperthyroidism), it can no longer produce any thyroxine, which can lead to hypothyroidism.

However, this is not always the case and it’s important to remember that both conditions are very treatable. If you’re concerned about either condition, please speak to your doctor.

Causes of hyperthyroidism

There are a number of possible causes of hyperthyroidism, including:

– autoimmune disease: the body’s immune system attacks the thyroid gland, causing it to produce too much hormone
– Graves’ disease: the most common form of autoimmunehyperthyroidism
– toxic nodular goiter: an overgrowth of thyroid tissue that can develop in response to long-term iodine deficiency or exposure to certain drugs or chemicals
– subacute thyroiditis: inflammation of the thyroid gland that is often caused by a viral infection

While the exact cause of hyperthyroidism may not be known, there are a number of potential contributing factors. If you have hyperthyroidism, it is important to work with your healthcare team to determine the best course of treatment.

Symptoms of hyperthyroidism

Hyperthyroidism is a condition that results from an overactive thyroid gland. The thyroid is a small, butterfly-shaped gland located in the front of the neck. It produces hormones that regulate many of the body’s functions, including metabolism.

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Symptoms of hyperthyroidism can vary depending on the individual, but may include weight loss, anxiety, irritability, tremors, heat intolerance, sweating, and changes in menstrual cycles. hyperthyroidism can also cause an enlargement of the thyroid gland (goiter), and bulging eyes (exophthalmos).

Although hyperthyroidism can be treated with medication, in some cases it can lead to hypothyroidism. Hypothyroidism is a condition in which the thyroid gland does not produce enough hormones. Symptoms of hypothyroidism can include fatigue, weight gain, depression, and dry skin.

Treatment for hyperthyroidism

There are many different treatment options for hyperthyroidism, and each option comes with its own potential risks and benefits. One potential risk that is associated with some treatments for hyperthyroidism is the development of hypothyroidism. In general, the risk of developing hypothyroidism after treatment for hyperthyroidism is low, but it is still something that patients should be aware of. There are several different treatment options for hyperthyroidism, and each option has its own risks and benefits. Some treatments, such as radioactive iodine therapy, carry a small risk of causing hypothyroidism. Other treatments, such as surgery to remove the thyroid gland, carry a very low risk of causing hypothyroidism. Patients should discuss the risks and benefits of each treatment option with their doctor to decide which treatment is best for them.

Can treatment for hyperthyroidism cause hypothyroidism?

Yes, treatment for hyperthyroidism can cause hypothyroidism. This is because the treatment usually involves taking medication to suppress the thyroid gland, which can lead to the gland becoming underactive.


If you have been diagnosed with hyperthyroidism, it is important to work with your doctor to find the best treatment option for you. While treatment for hyperthyroidism can cause hypothyroidism, this is typically only temporary and can be managed with medication. If you are concerned about the possible side effects of treatment, be sure to discuss them with your doctor so that you can make the best decision for your health.

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