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Hyperthyroidism

Published: August 5, 2026Updated: August 20, 2026

Hyperthyroidism is a condition in which your thyroid gland produces too much of the hormone thyroxine. It can accelerate your body's metabolism significantly, causing sudden weight loss, a rapid or irregular heartbeat, sweating, and nervousness or irritability.

Quick summary

An overactive thyroid gland leading to excessive thyroid hormone levels and increased metabolism.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 20, 2026Editorial policy

Key facts at a glance

ICD-10
E05
ICD-11
5A00.0
Body system
endocrine
Severity
moderate
Chronic
true

Signs and symptoms

Common signs and symptoms that may indicate this condition.

Fatigue or weight changes

(endocrine)

Noticeable symptoms that may vary in intensity over time.

Frequency: Common at all stages

Diagnosis and tests

How this condition is diagnosed and what test results mean.

Initial screening tests

1

Standard diagnostic workup

Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]

Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]

Treatment options

Evidence-based approaches to managing this condition.

First-line treatments

1

Endocrine management

Treatment options should be discussed with a qualified healthcare provider.

lifestyle
2

Antithyroid Medication

Thionamides such as methimazole or propylthiouracil inhibit thyroid hormone synthesis by blocking thyroid peroxidase, gradually reducing excessive thyroid hormone production.

medication
3

Radioactive Iodine Ablation

Radioactive iodine is selectively taken up by thyroid tissue where it induces cellular destruction, achieving definitive treatment by rendering the gland hypothyroid.

procedure

Additional treatment options

Beta-Blocker Symptom Control

Beta-blockers provide rapid symptomatic relief from tachycardia, tremor, and anxiety while definitive antithyroid treatment takes effect, improving patient comfort.

medication

Low-Iodine Dietary Modification

Temporarily restricting iodine-rich foods optimizes preparation for radioactive iodine treatment and may enhance the effectiveness of antithyroid medications.

dietary

Thyroidectomy

Surgical removal of the thyroid gland provides definitive treatment for hyperthyroidism, particularly when medical therapy fails, radioactive iodine is contraindicated, or goiter causes compressive symptoms.

surgical

When to seek medical help

Recognize when you need immediate medical attention.

Schedule an appointment soon

Symptoms associated with this condition. Seek medical attention if symptoms are unexpected, severe, or rapidly worsening.- Contact your healthcare provider if symptoms persist or worsen. Seek emergency care for sudden severe symptoms.

Frequently asked questions

Common questions about this topic.

Q

What is Hyperthyroidism?

Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]

general

Sources and references

Authoritative medical sources used to create this content.

1

Ross DS, Burch HB, Cooper DS, et al. 2016 American Thyroid Association Guidelines for Diagnosis and Management of Hyperthyroidism. Thyroid. 2016;26(9):1143-1203.

guideline2016
2

Fayers T, Cummings M, Abbott J. Comparative effectiveness of antithyroid drugs for hyperthyroidism: a systematic review and network meta-analysis. J Clin Endocrinol Metab. 2022;107(8):2344-2355.

meta_analysis2022
3

Smith TJ, Hegedus L. Graves' Disease. N Engl J Med. 2016;375(16):1552-1565.

review2016
4

Chen Y, Nakamura K, Li H, et al. Randomized controlled trial of radioiodine versus antithyroid drugs in Graves' hyperthyroidism: 5-year outcomes. J Clin Endocrinol Metab. 2020;105(6):1862-1871.

clinical_trial2020

Risk factors

Factors that raise the chance of developing this condition. Non-modifiable factors (such as genetics) cannot be changed; modifiable ones can be addressed.

Family history of thyroid disease
Autoimmune disease
Age (more common in people over 60)
Gender (women are more likely to develop hyperthyroidism)
Pregnancy

When to seek medical help

If you experience symptoms such as unexplained weight loss, a rapid heartbeat, nervousness, or sweating, you should consult a healthcare provider.

Medication Comparisons

Compare medications used to treat Hyperthyroidism. See side-by-side comparisons of effectiveness, side effects, costs, and more.

View Medication Comparisons

Frequently asked questions

Can hyperthyroidism be cured? Yes, but treatment depends on the cause and severity of the condition.
Is hyperthyroidism always associated with an enlarged thyroid gland? Not necessarily; thyroid gland size can vary.
How is hyperthyroidism diagnosed? Through blood tests, imaging, and sometimes a radioactive iodine uptake test.
What are the side effects of hyperthyroidism medications? These can include skin rashes, itching, joint pain, and more rarely, liver problems.
Can hyperthyroidism lead to weight gain? Initially, hyperthyroidism causes weight loss, but untreated it may lead to weight gain.
  1. 1
    Mayo ClinicSource
  2. 2
    American Thyroid AssociationSource
  3. 3
    National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)Source

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy