When is a blood test recommended for restless legs syndrome?

Restless legs syndrome causes an urge to move the legs, often with crawling, pulling, or aching sensations that worsen during rest and improve with movement. Low iron stores can contribute to these symptoms even when a routine blood count does not show anaemia.

A clinician may check iron-related measures and may assess blood count, kidney function, thyroid function, or other findings based on your history. Pregnancy, kidney disease, medicines, and sleep conditions can change the assessment. Results are interpreted with the symptom pattern rather than used alone.

Keep a short record of when symptoms occur, how long they last, whether movement relieves them, and how sleep is affected. List medicines, supplements, caffeine use, pregnancy status, and known kidney or iron problems. Ask whether fasting or morning collection is needed, and do not begin iron supplements without advice.

Arrange an appointment when leg sensations repeatedly disturb sleep, affect work, or make travel and sitting difficult. Seek urgent care for a swollen, hot, very painful leg, sudden breathlessness, chest pain, or fainting, because these symptoms need assessment for causes beyond restless legs syndrome.

Should my iron stores be checked even if my blood count is normal? Could any medicine or supplement be worsening symptoms? Do I need repeat testing? What treatment is appropriate if iron is low?