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Doctor insights on: Can Hypothyroidism Turn Into Hyperthyroidism

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Dr. Alan Feldman
Board Certified, Endocrinology
35 years in practice
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How typical is it for hyperthyroidism to turn into hypothyroidism?

How typical is it for hyperthyroidism to turn into hypothyroidism?

Not common: The most common cause of hyperthyroidism is graves disease, an autoimmune disorder that stimulates the thyroid to be overactive. Another autoimmune thyroid disease is hashimoto's thyroiditis, in which the immune system is attacking and destroying thyroid function. Sometimes you can start with one, and it can evolve into the other. Also, subacute thyroiditis causes initial high thyroid that goes low. ...Read more

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Dr. Cindy Juster
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Dr. Su Fairchild
1,132 doctors shared insights

Hypothyroidism (Definition)

Hypothyroidism is also known as Underactive thyroid. Level, which can cause fatigue increased sensitivity to cold constipation dry skin unexplained weight gain puffy face hoarseness muscle weakness elevated blood cholesterol level muscle aches, tenderness and stiffness pain, stiffness or swelling in your joints heavier than normal or irregular menstrual periods thinning hair slowed heart ...Read more


Dr. Ronald Krauser
Board Certified, Rheumatology
46 years in practice
65M people helped
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Dr. Cindy Juster
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30 years in practice
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Dr. PHILLIP KIM
Board Certified, Family Medicine
9 years in practice
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Would hyperthyroidism turn into hypothyroidism if you used an overdose of medicine?

Would hyperthyroidism turn into hypothyroidism if you used an overdose of medicine?

Yes: Meds such as Methimazole or ptu in high dosage can suppress thyroid levels when overactive such as in grave's disease. Thyroid levels must be monitor whether the dosage is too much or too little. ...Read more

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Dr. Cindy Juster
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Dr. Susan Wingo
Board Certified, Endocrinology
27 years in practice
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Is it possible to be hyperthyroid with hypothyroid symptoms?

Is it possible to be hyperthyroid with hypothyroid symptoms?

Yes.: While some symptoms of hypothyroidism are the opposite of hyperthyroidism, some are the same! Both hypo and hyperthyroidism can cause fatigue, weight gain, and poor concentration. Or the symptoms could be unrelated to the thyroid. See your doctor to find out what caused the hyperthyroidism, make a plan for treating it, and then, if symptoms are still present, finding what else might be going on. ...Read more

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Dr. Robert Lang
Board Certified, Endocrinology
46 years in practice
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I was hypothyroid but now have hyperthyroid, what can I do?

I was hypothyroid but now have hyperthyroid, what can I do?

See your doctor: The most common cause would be that you are getting too much medication. Rarely, a patient with hypothyroidism will convert to graves' disease or autoimmune hyperthyroidism. This will require medication radioactive iodine treatment or surgery. ...Read more

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Dr. Susan Wingo
Board Certified, Endocrinology
27 years in practice
4M people helped
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I was hypothyroid but now am hyperthyroid - should I discontinue my meds so I don't get more hyper?

No: This may be due to taking too much thyroid hormone, but stopping the thyroid pill would likely lead to too little thyroid hormone. Most often, in this situation, a dose adjustment is needed. This means working closely with the doctor who prescribed the thyroid hormone for you to find the "just right" dose for you.. ...Read more

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Dr. Alan Feldman
Board Certified, Endocrinology
35 years in practice
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Is it true that hypothyroid and hyperthyroid are the same thing and are medicines the same ?

Opposite conditions: Hypothyroid is low thyroid levels, hyperthyroid is high thyroid levels. They are opposite conditions, so the medications to treat them are completely different. ...Read more

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Dr. Susan Wingo
Board Certified, Endocrinology
27 years in practice
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Dr. Paul Kaplowitz
Board Certified, Pediatric Endocrinology
39 years in practice
131K people helped
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Could it be hyperthyroid or hypothyroid?

Take a blood test: Symptoms of hypothyroidism and hyperthyroidism are quite different so if you are unsure i suspect he problem is not your thyroid. If you were found to have an enlarged thyroid the problem could be either one and it could be mild enough that you would have no symptoms. Your regular doctor can examine you and tell you if you have an enlarged gland and check your thyroid tests if necessary. ...Read more

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Dr. Quang Nguyen
799 doctors shared insights

Underactive Thyroid (Definition)

The thyroid makes thyroid hormone, the main one is t4, which is converted in other tissues to t3. An underactive thyroid makes too little thyroid hormone. You feel sluggish, bloated, constipated, cold. It is treated by taking replacement hormone levothyroxine. The thyroid also makes calcitonin, which is involved in calcium metabolism, but it is a weak hormone in ...Read more


Dr. Susan Wingo
463 doctors shared insights

Overactive Thyroid (Definition)

Hyperthyroidism, often called "overactive thyroid," is a condition where the thyroid secretes too much of the thyroid hormones. Common symptoms include heat intolerance, increased appetite, ...Read more


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Dr. Cindy Juster
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