What hyperthyroidism is
Hyperthyroidism is when the thyroid produces too much thyroid hormone, speeding up your metabolism. It's less common than an underactive thyroid but important to recognise, because the symptoms can be distressing and, untreated, it can affect your heart and bones.
It's more common in women, and can develop at any age.
Symptoms and causes
Typical symptoms include anxiety, irritability or restlessness, a fast or irregular heartbeat, unexplained weight loss despite a good appetite, feeling hot and sweating easily, shaky hands, difficulty sleeping, and lighter or less frequent periods. Some people notice bulging eyes or a swelling in the neck.
The most common cause is Graves' disease, an autoimmune condition where the immune system stimulates the thyroid. Other causes include overactive thyroid nodules and, temporarily, some types of thyroid inflammation.
How it's treated
Hyperthyroidism is diagnosed with blood tests (a low TSH with high thyroid hormones) and sometimes further tests to find the cause. Treatment depends on the cause and may include medications that reduce thyroid hormone production, radioactive iodine, or occasionally surgery. Medication to control symptoms like a racing heart may be used while things settle.
It's very treatable, but needs proper diagnosis and monitoring. If you have these symptoms, see a GP for a thyroid blood test — a telehealth consult can arrange it and guide the next steps.
Related condition
Thyroid health →References & sources
- 1.Hypothyroidism — healthdirect
- 2.Thyroid gland — healthdirect
- 3.Thyroid gland — Better Health Channel
This content is general information and not a substitute for individual medical advice. Please consult a GP for your personal situation.
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