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Doctor insights on: Can An Underactive Thyroid Turn Into An Overactive Thyroid

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Dr. Susan Wingo
521 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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If you increase your thyroid medication can you go from hypothyroidism to hyperthyroidism?

If you increase your thyroid medication can you go from hypothyroidism to hyperthyroidism?

Technically, no: You can be overtreated and your thyroid hormone levels can be too high, but technically speaking, your thyroid is not over active.

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I'm 27. Can a nodule on your thyroid cause hypothyroidism, hyperthyroidism or either? Thank you very much

I'm 27. Can a nodule on your thyroid cause hypothyroidism, hyperthyroidism or either? Thank you very much

Yes and no.: Yes. "Functional" nodules producing thyroid hormone independent of the feedback system involving thyroid stimulating hormone from your pituitary, can cause hyperthyroidism. Typically you do not develop hypothyroidism due to a single nodule. A nodule may also represent a benign or cancerous growth. Typically thyroid nodules are biopsied and various imaging helps categorize the type. Follow up w/ MD

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What type of thyroid disease would cause an individual to toggle between Hypothyroidism and Hyperthyroidism symptoms?

What type of thyroid disease would cause an individual to toggle between Hypothyroidism and Hyperthyroidism symptoms?

Breakdown of: Thyroid that releases thyroid hormone as the gland is being destroyed in the long term. This is called Graves disease. Http://emedicine. Medscape. Com/article/925147-overview#a5 a good source of information on this.

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Thyroid scan/uptake shows mild hyperthyroidism, blood-work shows hypothyroidism. What's up with that?

Thyroid scan/uptake shows mild hyperthyroidism, blood-work shows hypothyroidism. What's up with that?

Labs are right: Thyroid scan/uptake shows how active someone's thyroid is in trapping iodine, but not whether or not their thyroid is able to convert iodide to iodine and make thyroid hormone with it. In this situation, the labs tell the true story - that the thyroid can't make enough thyroid hormone. Uptakes and scans are morehelpful in people with hyperthyroidism, and don't add much info in hypothyroidism.

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My thyroid scan/uptake shows mild hyperthyroidism, but blood-work shows hypothyroidism. Does this happen often? What should I do?

My thyroid scan/uptake shows mild hyperthyroidism, but blood-work shows hypothyroidism. Does this happen often? What should I do?

Antibodies: You probably have several types of thyroid antibodies floating around your system. Some cause hyperthyroidism while others may block their effect on the thyroid receptor. Treat your levels- if you're hypo - treat with synthroid (thyroxine). Monitor function and antibody levels over time.

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Diagnosed with thyroid disease at 9 years presented as hyperthyroidism and then converted to hypothyroidism. Main concern is mood changes, have done lots of research nothing that links mood changes and thyroid disease. Endocrinologist has never compromise

Diagnosed with thyroid disease at 9 years presented as hyperthyroidism and then converted to hypothyroidism. Main concern is mood changes, have done lots of research nothing that links mood changes and thyroid disease. Endocrinologist has never compromise

Thyroid and mood: Hyperthyroidism often causes anxiety. Hypothyroidism can lead to several psychiatric problems, most commonly depression. There can also be cognitive (thinking) impairment, and in severe (and rare) cases, psychosis. Correcting the thyroid imbalance usually corrects the changes in mood and thinking.

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Diagnosed with thyroid disease at 9 years presented as hyperthyroidism and then converted to hypothyroidism. Main concern is mood changes, have done lots of research nothing that links mood changes and thyroid disease. Endocrinologist has never compromise

Diagnosed with thyroid disease at 9 years presented as hyperthyroidism and then converted to hypothyroidism. Main concern is mood changes, have done lots of research nothing that links mood changes and thyroid disease. Endocrinologist has never compromise

Mood changes: Mood changes can be directly related to hormonal levels. Very high thyroid levels mimic anxiety/agitation; very low levels mimic depression. Thyroid levels are measured by lab tests (T3, T4). If you are now hypothyroid, your endocrinologist can rx thyroid hormone to take orally to bring your levels to normal. Mood changes are more likely due to other hormone levels, and interactions are complex.

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I have hypothyroidism but my doc said I may have hyperthyroidism as well. Could smoking marijuana have caused this or affect my thyroid at all?

I have hypothyroidism but my doc said I may have hyperthyroidism as well. Could smoking marijuana have caused this or affect my thyroid at all?

Unlikely: Though certain thyroid conditions can cause both hypo and hyper thyroidism at one point or another, both cannot exist at the same time. It would be like saying your gas tank is full and empty at the same time. At this time there aren't any conclusive studies showing that chronic marijuana use directly affects thyroid function. However, marijuana does affect other hormones.

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What is the relationship between thyroid hormone and estrogen? Why there's amenorrhoea in hyperthyroidism and menorrhagia in hypothyroidism?

What is the relationship between thyroid hormone and estrogen? Why there's amenorrhoea in hyperthyroidism and menorrhagia in hypothyroidism?

Thyroid and periods: With either hyper or hypothyroidism, there can be a wide variety of menstrual disorders. It is not just a matter of estrogen, the cycling of estrogen and Progesterone is usually thrown off.

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Eye checkup Dr said eyes dry. Asked about Thyroid. My mother hypo. My GM was goiters. Is it Hypothyroidism or Hyperthyroidism that would give dry eyes?

Eye checkup Dr said eyes dry. Asked about Thyroid. My mother hypo. My GM was goiters. Is it Hypothyroidism or Hyperthyroidism that would give dry eyes?

Both: Both conditions can have dry eyes as a symptom, as can numerous other conditions such as aging, environmental exposures (wind, dust, excessive sunlight), medications like antihistamines, decongestants, sleep aides, antidepressants, diuretics, etc.

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Thyroid ultrasound results showed hyperthyroidism but blood tests came back saying hypothyroidism TSH 11.4 antibodies teat also came back high?

Thyroid ultrasound results showed hyperthyroidism but blood tests came back saying hypothyroidism TSH 11.4 antibodies teat also came back high?

Size v function: The ultrasound can only tell you the anatomy of the thyroid whereas the blood tests tell you how it functions. In your case, you have low thyroid function and probably an enlarged thyroid.

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How can you address an underactive thyroid?

Levothyroxine: This is thyroid hormone replacement. An under active thyroid doesn't make enough thyroid hormone. Fortunately, there is oral replacement medication making it very easy to treat.

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What are the symptoms of an underactive thyroid?

What are the symptoms of an underactive thyroid?

Varies: Palpitations, tremors, muscle weakness, heat intolerence, weight loss, anxiety - or some people have few if any symptoms (so called "apathetic" hyperthyroidism).

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How can I know if I have an underactive thyroid?

How can I know if I have an underactive thyroid?

Tests and Symptoms: Symptoms of low thyroid function are commonly fatigue, weight gain, heavy periods (females), dry skin, hair thinning and loss, depression and constipation. Tsh, free T3 (liothyronine) and free T4 (if TSH is borderline) as well as some other older tests like morning baseline temperature and tendon reflex testing can all detect low thyroid function.

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Will an underactive thyroid ever go back to normal?

Thyroid: It can depending on what the primary cause is. Most people have "acquired hypothyroidism" due to thyroid inflammation. This may be chronic but it could also go into remission.

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A concern about an underactive thyroid, what to do?

A concern about an underactive thyroid, what to do?

Thyroid: Get ur thyroid profile drawn. Ur pcp should be able to treat if levels are abnormal.

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Describe symptoms of an underactive thyroid in women?

Many: Weight gain, abnormal periods, fatigue, weakness, slow heart rate, hair loss, bad nails and a multitude of other problems. It's easy to check for with a simple blood test. See you doctor.

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Dr. Su Fairchild
1,242 Doctors shared insights

Hypothyroidism (Definition)

When the thyroid gland is overactive and too much thyroid hormone is produced, which speeds up metabolism. This results in weight loss, a quick heartbeat, sweating, nervousness, ...Read more


Dr. Quang Nguyen
866 Doctors shared insights

Hypothyroidism (Adult) (Definition)

Hypothyroidism is a condition where the thyroid gland does not secrete enough of the thyroid hormones. Symptoms include cold intolerance, constipation, and fatigue. ...Read more