What is Subacute Thyroiditis?

This is a temporary inflammation of the thyroid gland, usually triggered by a viral infection (like the flu, mumps, or COVID-19). The virus damages the thyroid cells, causing them to leak stored hormone into the bloodstream.

What does it feel like?

• Pain: The hallmark sign is neck pain (in the thyroid area) that can radiate to the jaw or ears. The neck is often very tender to touch.
• Hyperthyroid Symptoms: At first, you may feel anxious, shaky, and have a fast heart rate because of the leaked hormone.
• Flu-like symptoms: Fever and fatigue.

What is the "Rollercoaster"?

• Hyperthyroid Phase (Weeks 1-6): High hormone levels from leakage.
• Hypothyroid Phase (Weeks 6-12): The gland is depleted and healing, so levels drop too low (fatigue, weight gain).
• Recovery: In 90-95% of people, the thyroid heals completely and returns to normal function.

How is it treated?

• Pain Relief: NSAIDs (Ibuprofen/Naproxen) or Prednisone for severe pain.
• Symptom Control: Beta-blockers to slow down the heart rate.
• Do NOT take anti-thyroid meds: Methimazole doesn't work here because the thyroid isn't making new hormone; it's just leaking.