Thyroid Goitre
A goitre is an abnormal enlargement of the thyroid gland. It can be diffuse (the whole gland enlarges uniformly) or nodular (enlargement due to one or more nodules).
Some goitres are barely noticeable; others cause visible swelling or compressive symptoms.
Last medically reviewed: 1 November 2025
Causes
Historically, iodine deficiency was the leading cause worldwide and remains important in some regions. In iodine-sufficient areas, common causes include Hashimoto’s thyroiditis, Graves’ disease, multinodular goitre, and thyroiditis.
Certain medications — lithium, amiodarone — and goitrogenic foods in very large amounts can also contribute.
Symptoms
Many goitres are asymptomatic and found incidentally. Larger goitres may cause a visible neck swelling, a feeling of tightness, difficulty swallowing (dysphagia) or a hoarse voice if the recurrent laryngeal nerve is involved. Retro-sternal extension can rarely cause breathing difficulty.
Function tests determine whether the enlarged gland is overactive, underactive or euthyroid (normal function).
Evaluation and treatment
Ultrasound assesses size and structure; TSH and antibody tests determine function and cause. Small, asymptomatic goitres with normal function often need only monitoring.
Treatment depends on cause: levothyroxine may shrink a Hashimoto’s goitre; antithyroid drugs or RAI treat toxic goitres; surgery is indicated for compressive symptoms, suspicion of cancer, or cosmetic concerns. Very large goitres may need specialist surgical assessment.
Frequently asked questions
Is a goitre always a sign of thyroid disease?
Not always — a mild diffuse enlargement can occur without dysfunction. However, all goitres warrant evaluation to exclude hypothyroidism, hyperthyroidism, nodules or cancer.
Can a goitre shrink on its own?
Sometimes. Small goitres related to thyroiditis or transient causes may regress. Iodine-deficiency goitres improve with iodine correction; autoimmune goitres may slowly change over time.
When does a goitre need surgery?
Surgery is considered for compressive symptoms (trouble breathing or swallowing), suspicion of cancer, failure of medical therapy for toxic goitre, or significant cosmetic concern — decided case by case.
References & further reading
This page is based on established medical knowledge and guidelines from authoritative sources. Always consult a qualified clinician for personal medical advice.
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