Restless Legs at Night: What the Urge to Move Usually Means After 45
Restless legs at night after 45 usually mean restless legs syndrome, an urge to move that builds at rest and eases with movement, and low iron is the one cause a blood test finds. It is a neurological condition, more common in women, that often runs in families and typically begins in middle age, which is why it so often surfaces alongside the other changes of midlife.
This page covers what the sensation usually is, what else produces it, the medications that quietly worsen it, the iron story, and the signs that need an in-person examination. The sleep page covers sleep that does not restore you as a whole; this page is about the legs.
What restless legs at night usually mean after 45
Restless legs syndrome has a recognizable shape. There is an urge to move, usually with an uncomfortable feeling deep in the legs that people describe as crawling, creeping, pulling, aching or fizzing. It starts or worsens when you are still, so it arrives in the evening on the sofa, on a long flight, and above all in bed, and it is worse at night than in the morning. Moving the legs, stretching or walking relieves it, and the relief lasts only as long as the movement does. Most people with it also have leg twitches or jerks during sleep that they do not feel but a partner does.
Those four features, the urge, the worsening at rest, the worsening in the evening and the relief with movement, are the diagnosis. There is no scan or blood test that confirms restless legs syndrome. What blood tests do is look for the things that cause or worsen it, and the most important of those is iron. Researchers have found low iron in the brain in people with the condition even when blood iron looks adequate, and iron deficiency is a recognized cause of secondary restless legs. The International Restless Legs Syndrome Study Group's guideline is built on assessing iron status.
Why it clusters in midlife is partly genetic timing and partly iron. Heavy or irregular periods in perimenopause are one of the commonest causes of iron loss in women over 45, and restless legs is a recognized complication of iron-deficiency anemia. A woman whose legs became restless in the same two years her cycle became unpredictable is describing one story.
What else causes it
Medications. Sedating antihistamines, including the ingredient in most over-the-counter sleep aids and many allergy tablets, commonly worsen restless legs. So do many antidepressants, particularly those that raise serotonin, most anti-nausea drugs, and antipsychotic medicines. A symptom that appeared within weeks of a new prescription or a nightly sleep aid should prompt a medication review first.
Alcohol, caffeine and nicotine. All three can trigger or worsen symptoms, and evening alcohol falls exactly in the window when symptoms peak.
Kidney disease. Restless legs are common in people with kidney failure.
Nerve damage. Peripheral neuropathy, most often from diabetes, produces burning, tingling and numbness in the feet that can be confused with restless legs. The distinction is that neuropathy does not reliably ease with movement and is present in the day as well. Tingling in hands and feet covers that pattern.
Poor circulation. Aching, cramping or heaviness in the calves that comes on with walking and stops with rest points to the arteries, not the nerves, and it is the reverse of restless legs, which improve when you walk.
A clinician tells these apart by timing and by what relieves the feeling. Symptoms that follow the clock, arrive with stillness and vanish with pacing are restless legs. Symptoms that follow effort, or are there at breakfast, are something else.
What is measurable
Iron status is the measurable center of this symptom. That means ferritin, the storage form of iron, alongside serum iron, transferrin saturation and a complete blood count to see whether the deficiency has reached the point of anemia. Ferritin is the marker specialists look at first, because it can fall before the blood count changes, and it is read with the other markers because inflammation raises it. Kidney function, glucose, A1c and thyroid function complete the panel. Vitamin B12 is worth including where there is numbness or tingling, since a deficiency produces its own nerve symptoms.
What blood work cannot do is confirm the diagnosis; no lab result substitutes for the four clinical features above. Nor can it tell you what your legs do while you sleep. Where the picture suggests periodic limb movements or another sleep disorder alongside, a sleep study is the test, and it is not one we perform. Lab testing covers what a baseline panel includes, what low ferritin means explains the marker, and the lab markers FAQ answers the common questions about reading a result.
When to see someone in person
Pain, swelling, redness or warmth in one leg. This is not restless legs. It is the pattern of a blood clot in a deep vein and needs to be seen the same day. If it comes with chest pain, breathlessness, coughing up blood or fainting, call 911 or go to the nearest emergency department.
Numbness or weakness. Loss of feeling, foot drop, a leg that gives way, or symptoms on one side only point to a nerve or spinal problem and need an in-person neurological examination.
Symptoms during the day that disturb work. Restless legs that have spread into the daytime, or into the arms, have usually become severe and warrant a specialist.
Calf pain on walking that stops with rest. This is the pattern of peripheral artery disease and needs in-person vascular assessment, particularly if a foot is cold, pale or has a sore that will not heal.
ACT 2 Health is a telehealth practice. We do not perform physical or neurological examination, imaging or sleep studies, and we do not diagnose or treat restless legs syndrome. We check what is measurable and refer.
The medication list nobody checks
Ask most people with restless legs what they take at night and the answer is often the thing making it worse. The ingredient in most over-the-counter sleep aids is a sedating antihistamine, and sedating antihistamines are on every list of medicines that aggravate restless legs. So the sequence is common: legs keep you awake, you buy something to help you sleep, it makes the legs worse, and you take more. The same loop runs with bedtime allergy tablets, with the anti-nausea medicine in the cabinet, and with an antidepressant started for the low mood that months of broken sleep produced.
None of these should be stopped without talking to whoever prescribed them, and this page is not the place to change a prescription. It is the place for the question. Before a single lab is drawn, write down everything you take in the evening, including anything bought without a prescription, and bring the list.
Frequently asked questions
Restless legs at night are most often restless legs syndrome, a neurological condition linked to how the brain handles iron and dopamine, and it frequently runs in families. Low iron stores, kidney disease, pregnancy and nerve damage can cause or worsen it, as can sedating antihistamines, many antidepressants, anti-nausea drugs, alcohol, caffeine and nicotine.
Iron deficiency is one recognized cause of restless legs syndrome and the one a blood test can find, but it is not the only one. Many people with restless legs have normal iron, and low brain iron has been found even when blood iron appears adequate. Ferritin is the marker clinicians check first. The lab markers FAQ explains how it is read.
Restless legs are more common in women, typically begin in middle age, and often surface in the perimenopause years. The clearest link is iron: heavy or irregular bleeding in the transition drains iron stores, and iron deficiency is a recognized cause of restless legs. Symptoms nobody warns you about covers the wider list.
Restless legs affect sleep by making it hard to lie still long enough to fall asleep, and most people with the condition also have leg movements during sleep that fragment it without waking them fully. The result is unrefreshing sleep, daytime fatigue and poor concentration.
ACT 2 Health does not diagnose or treat restless legs syndrome. We measure the markers that cause or worsen it, iron status above all, review the medications that aggravate it, and refer you to a clinician who can examine you when the picture calls for it. The sleep FAQ explains what we do and do not do for sleep complaints.
Restless legs are a sign of something more urgent when the discomfort is in one leg with swelling, redness or warmth, which suggests a clot and needs same-day assessment, or when there is numbness, weakness or a leg that gives way. Pain in the calves brought on by walking and relieved by rest points to the arteries and also needs in-person examination.
Where this fits in your plan
The practical next step is two lists: a fortnight's record of when the sensation arrives and what relieved it, and everything you take after dinner, including anything bought over the counter. Bring both to a baseline panel that includes ferritin, iron studies, a complete blood count, kidney function, glucose and thyroid. If any red flag above applies, the in-person visit comes first.
Iron and the other measurable contributors route through lab testing; the sleep side routes through the sleep page. ACT 2 Health checks what can be measured, reviews the medication list, and refers. We do not diagnose or treat restless legs syndrome, and we do not perform sleep studies.
We measure first. Then we act.
References
- National Institute of Neurological Disorders and Stroke. Restless Legs Syndrome. NIH, 2026. https://www.ninds.nih.gov/health-information/disorders/restless-legs-syndrome
- American Academy of Sleep Medicine. Restless Legs Syndrome. Sleep Education, 2024. https://sleepeducation.org/sleep-disorders/restless-legs-syndrome/
- Cleveland Clinic. Restless Legs Syndrome (RLS): Symptoms & Treatment. Cleveland Clinic, 2026. https://my.clevelandclinic.org/health/diseases/9497-restless-legs-syndrome
- Allen RP, Picchietti DL, Auerbach M, et al. Evidence-based and consensus clinical practice guidelines for the iron treatment of restless legs syndrome/Willis-Ekbom disease in adults and children: an IRLSSG task force report. Sleep Medicine, 2018. https://pubmed.ncbi.nlm.nih.gov/29425576/
- National Heart, Lung, and Blood Institute. Iron-Deficiency Anemia. NIH, 2022. https://www.nhlbi.nih.gov/health/anemia/iron-deficiency-anemia
- MedlinePlus. Deep vein thrombosis. National Library of Medicine, 2025. https://medlineplus.gov/ency/article/000156.htm
- National Heart, Lung, and Blood Institute. Peripheral Artery Disease: Symptoms. NIH, 2022. https://www.nhlbi.nih.gov/health/peripheral-artery-disease/symptoms
- MedlinePlus. Vitamin B12 deficiency anemia. National Library of Medicine, 2026. https://medlineplus.gov/ency/article/000574.htm
- Back toSymptoms
- Sleep that does not restore youWhy seven hours can leave you wrecked: sleep-disordered breathing, alcohol, hormones, thyroid and mood.Read
- Lab testingComprehensive blood, hormone, gut, methylation and glucose testing — the baseline every plan is built on.Read
- What low ferritin meansFerritin falls before hemoglobin, which is why you can feel depleted with a normal blood count. What low ferritin means, and why the cause matters most.Read
- Tingling in hands and feetTingling in hands and feet after 45 usually means a compressed or slowly damaged nerve. The measurable causes, what the pattern means, and the 911 signs.Read
- Waking in the second half of the nightWaking at three or four a.m. is a pattern, not a coincidence. What the second half of the night does differently, and which causes are measurable.Read
- Sleep FAQNon-restorative sleep after 45: sleep apnea screening and referral, waking at 3am, alcohol, hormones, sleep studies, and the blood tests that matter.Read
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ACT 2 Health provides clinician-led care. Treatments are available only to eligible patients following clinical evaluation and within applicable regulations. This content is educational and is not medical advice. Individual results vary.
Diagnostic testing does not diagnose or rule out disease on its own and is interpreted by a licensed provider alongside your history and examination.
Care is delivered via telemedicine by healthcare professionals licensed in the state where the patient is located. Services are available only in states where our providers are licensed.
ACT 2 Health does not diagnose or treat restless legs syndrome; we check what is measurable and refer. Pain with swelling, redness or warmth in one leg needs same-day assessment, and with chest pain or breathlessness means calling 911.