⚡ Quick Answer

Thyroiditis is inflammation of the thyroid gland that can cause temporary hyperthyroidism, hypothyroidism, or both in sequence, depending on the type. Most forms resolve on their own, though Hashimoto's thyroiditis typically leads to permanent hypothyroidism requiring lifelong treatment.

Thyroiditis refers to inflammation of the thyroid gland. It encompasses a group of conditions with different causes, clinical courses, and treatments — but all share thyroid inflammation as a central feature. Thyroiditis can cause hyperthyroidism, hypothyroidism, or both at different phases.

Types of Thyroiditis

  • Hashimoto's Thyroiditis (Chronic Autoimmune Thyroiditis) — The most common form; an autoimmune attack leading to gradual hypothyroidism. Discussed in detail on its own page.
  • Subacute (De Quervain's) Thyroiditis — Painful thyroid inflammation, usually following a viral illness. Often causes transient hyperthyroidism followed by hypothyroidism, then recovery.
  • Postpartum Thyroiditis — Occurs in 5–9% of women within 1 year after delivery. Often follows the same pattern as subacute thyroiditis.
  • Silent (Painless) Thyroiditis — Similar clinical course to subacute thyroiditis but without neck pain; often autoimmune.
  • Drug-Induced Thyroiditis — Caused by medications including amiodarone, interferons, checkpoint inhibitor immunotherapy, and lithium.
  • Acute (Suppurative) Thyroiditis — Rare bacterial infection of the thyroid; presents with acute neck pain, fever, and tenderness.
  • Riedel's Thyroiditis — Very rare; fibrous tissue replaces normal thyroid tissue, causing a rock-hard, fixed goiter.

Subacute Thyroiditis — A Closer Look

Subacute thyroiditis typically follows a URI or flu-like illness by 2–6 weeks. The hallmark is a tender, painful thyroid gland. The clinical course has distinct phases:

  1. Thyrotoxic phase (2–8 weeks): Inflammation releases stored thyroid hormone — symptoms of hyperthyroidism plus neck pain
  2. Hypothyroid phase (weeks to months): Depleted hormone stores cause transient hypothyroidism
  3. Recovery phase: Most patients recover normal function within 12 months; ~5% develop permanent hypothyroidism

💊 Treatment of Subacute Thyroiditis: Anti-inflammatory medication (NSAIDs or, for severe cases, prednisone) treats the pain and inflammation. Beta-blockers manage hyperthyroid symptoms during the thyrotoxic phase. Antithyroid drugs are NOT used because the excess hormone comes from inflammation, not overproduction.

Key Takeaways

  • Thyroiditis is a group of conditions causing thyroid inflammation
  • Many forms cause a temporary pattern of hyperthyroidism followed by hypothyroidism
  • Subacute thyroiditis typically follows a viral illness and presents with a painful thyroid
  • Most forms of thyroiditis are self-limiting, but monitoring for permanent hypothyroidism is important

Our Team Sees Thyroid Patients

All five of our providers evaluate and manage thyroid conditions. Book with any member of our team:

Dr. Libu Varughese, MD
Dr. Libu Varughese, MD
Endocrinologist · ABIM Board Certified
Thyroid nodules, thyroid cancer, parathyroid
 Dr. Jongoh Kim, MD
Dr. Jongoh Kim, MD
Endocrinologist · ABIM Board Certified
Thyroid disorders, Graves' disease, thyroidectomy follow-up
 Dr. Chhavi Chadha, MD
Dr. Chhavi Chadha, MD
Endocrinologist · ABIM Board Certified
Hypothyroidism, Hashimoto's, thyroid ultrasound
 Dr. Amelita Basa, MD
Dr. Amelita Basa, MD
Endocrinologist · ABIM Board Certified
Thyroid & hormonal conditions
 Angel Chazhikat, DNP
Angel Chazhikat, DNP
Doctor of Nursing Practice
Thyroid management, patient education

Book an Appointment →   or call 832-968-7003

Medical Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before making any changes to your treatment plan. Individual medical decisions should be made in partnership with your physician based on your specific circumstances.