Hyperthyroidism and thyrotoxicosis

Hyperthyroidism describes an overactive thyroid gland making excess hormone. Thyrotoxicosis is the broader effect of having too much thyroid hormone activity, which can also happen when thyroid tissue releases stored hormone or when thyroid medicine is too strong. The terms are related but are not interchangeable in every situation.

Symptoms may include palpitations, sweating, heat intolerance, anxiety, sleep difficulty, diarrhoea, tremor and weight change. A clinician uses your history, examination and thyroid blood tests to look for the source rather than relying on symptoms alone.

Arrange a medical review if symptoms persist or several appear together. Bring every medicine and supplement, including thyroid products, and note when symptoms started. Do not increase, stop or share thyroid medicine; the appropriate action depends on the cause.

Follow the testing plan and ask how to monitor your pulse and symptoms. Treatment may involve managing thyroid production, adjusting prescribed hormone, or observing a temporary thyroid inflammation pattern. The plan should be tailored after the test results are reviewed.

Seek emergency help for chest pain, fainting, severe breathlessness, confusion, or a very fast or irregular heartbeat. Urgent assessment is also needed for a high temperature with severe agitation, shaking or sudden deterioration, or for vomiting and diarrhoea that prevent fluids.

Ask whether the findings show hyperthyroidism or another cause of thyrotoxicosis, which tests identify the source, how medicines should be taken, and which symptoms require same-day help.