Subacute thyroiditis is a condition characterized by acute inflammation of the thyroid gland. It is a self-limiting condition that often resolves on its own within a few months.

The exact cause of subacute thyroiditis is not known, but it is believed to be triggered by a viral or bacterial infection. In this article, we will discuss the symptoms of subacute thyroiditis.

1. Pain and discomfort in the neck

One of the primary symptoms of subacute thyroiditis is pain and discomfort in the neck. The inflammation of the thyroid gland can cause tenderness and soreness in the front of the neck.

The pain may radiate to the jaw or ears and may worsen with swallowing or turning the head.

2. Thyroid gland enlargement

Another symptom of subacute thyroiditis is the enlargement of the thyroid gland, also known as goiter. The thyroid gland may become visibly larger and can be felt as a swelling in the neck.

The enlargement is often uneven and may be accompanied by a sensation of pressure or fullness in the neck.

3. Hyperthyroid symptoms

During the early stages of subacute thyroiditis, the inflamed thyroid gland releases excessive amounts of thyroid hormones into the bloodstream. This can lead to symptoms of hyperthyroidism.

Common hyperthyroid symptoms include increased heart rate, irritability, heat intolerance, weight loss, tremors, and increased sweating.

4. Hypothyroid symptoms

As subacute thyroiditis progresses, the thyroid gland may become less active and produce fewer thyroid hormones. This can result in symptoms of hypothyroidism.

Hypothyroid symptoms may include fatigue, sluggishness, sensitivity to cold, dry skin, constipation, and unexplained weight gain.

5. Flu-like symptoms

Many individuals with subacute thyroiditis experience flu-like symptoms, such as fatigue, muscle aches, and low-grade fever.

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These symptoms are often the result of the underlying viral or bacterial infection that triggers the inflammation of the thyroid gland.

6. Tenderness and sensitivity in the thyroid region

Individuals with subacute thyroiditis may experience tenderness and sensitivity in the thyroid region. The neck area around the thyroid gland may feel particularly sensitive to touch.

This tenderness is often a result of the inflammation and swelling in the thyroid gland.

7. Difficulty swallowing

In some cases, subacute thyroiditis can cause difficulty swallowing, also known as dysphagia. The swollen thyroid gland may put pressure on the esophagus, making it uncomfortable or painful to swallow.

This symptom is typically temporary and resolves as the inflammation subsides.

8. Changes in voice

In rare cases, subacute thyroiditis can cause changes in voice or hoarseness. The inflammation of the thyroid gland may put pressure on the nearby recurrent laryngeal nerve, which controls the vocal cords.

This pressure can affect the function of the vocal cords, resulting in changes in voice quality.

9. Fatigue and weakness

Feeling excessively tired or experiencing weakness is a common symptom of subacute thyroiditis.

The disruption in thyroid hormone production and the accompanying inflammatory response can impact overall energy levels and lead to persistent fatigue and weakness.

10. Eye discomfort

In some cases, subacute thyroiditis may cause eye symptoms such as eye pain, redness, and swelling. This is known as thyroid eye disease or thyroid-associated ophthalmopathy.

It occurs due to the immune response and inflammation affecting the tissues around the eyes.