Hyperthyroidism and restless legs: what to know

Hyperthyroidism can cause difficulty sleeping, anxiety, sweating, and a racing heartbeat, which may make night-time leg discomfort feel harder to manage.

Restless legs usually involve an uncomfortable urge to move, symptoms that worsen during rest, and temporary relief with movement. Iron deficiency, medicines, nerve problems, pregnancy, and sleep disruption can also contribute. A clinician can separate these possibilities from thyroid-related symptoms using your history and examination.

If you have diagnosed hyperthyroidism, related symptoms can include heat intolerance, excessive sweating, diarrhoea, palpitations, and feeling anxious. These features do not identify the cause of leg sensations on their own.

Keep a short diary of when the sensations begin, whether movement helps, sleep lost, caffeine or medicine changes, and any cramps or numbness. Arrange a clinical review if symptoms recur or interfere with sleep. Ask whether thyroid tests and an iron assessment are appropriate before starting supplements.

Seek urgent care for sudden weakness, one-sided swelling or pain in a leg, chest pain, severe breathlessness, fainting, or a fast irregular heartbeat. Seek prompt review when sleeplessness is severe, symptoms are rapidly worsening, or you feel unusually agitated or unwell.

Ask whether your symptoms fit restless legs, which causes should be checked, whether thyroid control is adequate, and whether any current medicines or supplements could be contributing.