What is hypothyroidism?
Hypothyroidism, or underactive thyroid, is a condition in which the thyroid gland does not produce enough thyroid hormone. Thyroid hormones regulate metabolism, energy, body temperature, and many other functions. The most common cause in Australia is autoimmune thyroiditis (Hashimoto's disease). It is more common in women and tends to develop with age.
Symptoms can include fatigue, weight gain, cold intolerance, dry skin, constipation, hair thinning, low mood, and menstrual changes. Many symptoms are non-specific, which is why a blood test is essential for diagnosis.
How a telehealth GP can help
A NewDoc GP can take a history of your symptoms, order a thyroid function test, review the results with you, and commence or adjust thyroid hormone replacement therapy if indicated. Thyroid hormone replacement is available on the PBS and can be prescribed via eScript. Dose titration usually happens over several follow-up consultations.
Your GP can also arrange referrals to an endocrinologist for complex cases, and coordinate other relevant investigations such as cholesterol, ferritin, and vitamin D levels.
When to see a GP
Persistent fatigue, unexplained weight changes, or any of the symptoms above are reason to speak with a GP. Hypothyroidism is also relevant in pregnancy and fertility; if you are planning or are pregnant, speak with your GP promptly as monitoring requirements change.
Seek urgent care if you experience severe symptoms such as profound drowsiness, hypothermia, or confusion, which may indicate uncommon but serious complications.
References
- Hypothyroidism (underactive thyroid) — Healthdirect Australia
- Thyroid gland — Better Health Channel
- About hypothyroidism — Australian Thyroid Foundation
This content is informational and does not replace individual medical advice. For personal assessment, book a consultation with your GP. In emergencies, call 000.
Last reviewed 16 April 2026. Editorial policy