Why does iron deficiency anaemia cause restless legs?

Iron is involved in dopamine signalling, which helps coordinate movement. Low available iron may disrupt this signalling and produce an urge to move, often with crawling, pulling, tingling or uncomfortable feelings deep in the legs. Symptoms may be more noticeable during rest, in the evening, or when trying to sleep, and movement can bring short-lived relief. Restless Legs is a very common presentation of Iron Deficiency Anaemia, although restless legs can occur for other reasons as well.

Book an appointment if the urge to move your legs is disturbing sleep or daily life. Blood tests can assess iron status and anaemia; treatment may include addressing the reason for iron loss as well as replacing iron when appropriate. Until you are assessed, keep a brief symptom note covering timing, sleep disruption, medicines and any triggers. Gentle stretching, a warm bath or a short walk may ease an episode for some people. Do not start high-dose iron supplements without clinical advice.

Seek prompt advice if leg symptoms begin suddenly with one-sided swelling, redness, warmth or pain, as these need a different assessment. Contact a clinician soon for worsening sleep loss, new weakness, numbness, problems walking, or symptoms during pregnancy. Urgent care is appropriate for sudden breathlessness or chest pain.

Ask whether iron studies and a full blood count are needed, what could be lowering your iron, and whether any current medicines may worsen symptoms. Ask how treatment will be monitored and what to do if sleep remains disrupted.