Thyroiditis

1) Disease Description (Causes and Symptoms)

• Definition·Summary: Thyroiditis is a group of diseases involving inflammation of the thyroid gland. Depending on the cause and clinical presentation, it is classified into subacute (painful, de Quervain), chronic (autoimmune Hashimoto), acute (suppurative), and painless (painless·postpartum) types.
• Main causes
  • Autoimmune (including Hashimoto and painless postpartum thyroiditis)
  • After a viral infection (subacute)
  • Bacterial infection (acute/suppurative)
  • Medications (e.g., immunomodulators, interferon) or radiation injury
• Pathophysiology (brief): When inflammation destroys thyroid cells, stored thyroid hormones are released, causing temporary hyperthyroidism (FT4↑, TSH↓). This may then progress to hypothyroidism (FT4↓, TSH↑) due to hormone depletion (particularly in subacute and painless thyroiditis), or autoimmune thyroiditis may progress to chronic hypothyroidism.
• Typical symptoms
  • Painful form (subacute): Pain in the front or sides of the neck (radiating to the jaw or below the ear), fever, chills, generalized malaise, and muscle pain. ESR/CRP elevation.
  • Painless·autoimmune forms (Hashimoto, postpartum): No neck pain, with gradually worsening fatigue, weight gain, and sensitivity to cold (hypothyroid symptoms), or temporary hyperthyroid symptoms (palpitations, hand tremors, sweating).
  • Acute suppurative form: Severe localized pain, fever, signs of a localized abscess, and systemic symptoms.

2) Treatment Methods and Precautions

• Diagnostic-based principles: The type is determined based on symptoms and blood tests (TSH, free T4, T3, antithyroid antibodies), inflammatory markers (ESR, CRP), ultrasound, and, when necessary, a radioactive iodine (or technetium) uptake test and fine-needle aspiration (FNA).
• Medication treatment
  • Subacute (painful): Control pain with NSAIDs (e.g., ibuprofen) as first-line treatment. For an inadequate response or severe disease, use oral corticosteroids (e.g., prednisone 20–40 mg/day, followed by gradual tapering after symptoms improve).
  • Symptomatic hyperthyroidism: Use beta-blockers (e.g., propranolol) to relieve palpitations and tremors.
  • Hypothyroidism (persistent or symptom-producing): Use levothyroxine for replacement therapy.
  • Acute suppurative form: Broad-spectrum antibiotics (IV); if an abscess is present, drainage (surgical or percutaneous drainage).
• Procedures/Surgery
  • Drainage or excision is necessary for an abscess or a large nodule/abscess causing compressive symptoms.
  • Surgical excision may be considered for nodules suspected of malignancy or persistent compressive symptoms.
• Lifestyle management
  • Rest, limit activities that worsen pain, and maintain adequate hydration and nutrition.
  • Follow instructions for taking thyroid hormone medication (on an empty stomach, with an interval between calcium/iron/antacids).
• Precautions
  • Steroids are effective for short-term use, but caution is needed regarding side effects with long-term use (osteoporosis, increased blood glucose, increased risk of infection, etc.).
  • Do not stop levothyroxine on your own; dosage adjustment is necessary when planning pregnancy or during pregnancy (the dose increases during pregnancy).
  • Emergency evaluation is necessary in cases of pain, difficulty breathing, difficulty swallowing, rapid heartbeat, or high fever.
• Complications
  • Persistent or permanent hypothyroidism (especially Hashimoto)
  • Rarely, serious infectious complications (abscess, sepsis)
  • Compression of structures around the thyroid (breathing or swallowing difficulties)

3) Outpatient Visit Checkpoints (Including Preparations and Sample Questions)

• Recommended items to bring
  • A list of all medications currently being taken (including doses and times of administration) — especially thyroid medications, steroids, calcium, iron, and antacids
  • Previous medical records and test results (recent TSH, free T4/T3, antibody tests, ESR/CRP, and ultrasound findings)
  • Notes on when symptoms began and how they have progressed (fever, pain, weight changes, palpitations, etc.)
  • Pregnancy or breastfeeding status (for women)
  • Medication allergies and underlying conditions (diabetes, osteoporosis, etc.)
• Key information to provide to the doctor during the visit
  • Location and intensity of pain (pain score), and when it began to worsen
  • Whether fever or a recent history of infection (such as an upper respiratory tract infection) is present
  • Symptoms indicating changes in thyroid function, such as weight changes, fatigue, hand tremors, and changes in bowel movements
  • Recently taken or discontinued medications (interferon, lithium, etc.) and history of radiation therapy

4) Examples of General Questions to Ask the Doctor

• "Based on my current thyroid condition (test results), what course can I expect?"
• "What are the side effects and precautions for the medications you prescribed (levothyroxine/steroids/antibiotics)?"
• "What tests will I need in the future, and how often should I have them?"
• "I am planning to become pregnant. How will the treatment affect pregnancy?"

5) Examples of Disease-Specific Questions

• If you have subacute (painful) thyroiditis: "The pain is severe. If I start steroids, will it improve within a few days? What is the tapering plan?"
• If autoimmune (Hashimoto) or chronic thyroiditis is suspected: "Based on my current TSH level, when should I start levothyroxine? Will lifelong treatment be necessary, and how will changes in antibody levels affect treatment decisions?"

If you need further assistance, please provide your current test results (e.g., recent TSH, free T4, antibodies, ESR/CRP, and ultrasound findings) or the course of your symptoms for more specific guidance.