You finally sit down for the evening and your legs refuse to cooperate. There’s a creeping, crawling, fizzy feeling deep inside them, and an urge to move that’s almost impossible to ignore. You get up, walk to the kitchen, and it fades. Then you lie down in bed and it starts again.
That pattern, an uncomfortable feeling in the legs with a strong urge to move them, worse in the evening and at rest and relieved by moving, is the hallmark of restless legs syndrome (RLS). It can come on its own or be triggered by low iron, pregnancy, kidney disease, nerve damage, or certain medicines. Several of those causes can be checked and treated, and evening habits may ease the nights in the meantime.
What restless legs feel like
People struggle to describe it, and many use words like:
- Crawling, creeping, or “bugs under the skin”
- Pulling, throbbing, or aching
- Itching deep inside the legs
- Electric or fizzy
Mayo Clinic describes four key features: an urge to move the legs, symptoms that start after rest, relief with movement, and symptoms that are worse in the evening. Some people also have it in their arms. Many have leg jerks during sleep that they don’t notice but their partner does.
What sits behind it
MedlinePlus and Mayo Clinic describe two broad types. In many people, no single cause is found, and RLS often runs in families. In others, it’s linked to something else that may be treatable:
| Possible trigger | Why it matters | What to ask about |
|---|---|---|
| Low iron | One of the most important and treatable links | Iron and ferritin blood tests |
| Pregnancy | Often appears or worsens in late pregnancy and usually eases after delivery | Talk to your obstetric provider before any treatment |
| Kidney disease | Linked to RLS, especially in people on dialysis | Kidney function tests |
| Nerve damage (peripheral neuropathy) | Can cause or mimic RLS | See our guide on burning feet at night |
| Medicines | Mayo Clinic notes that some antihistamines, antinausea drugs, antidepressants, and antipsychotics can worsen RLS | Review with your doctor or pharmacist |
| Caffeine, alcohol, nicotine | Can make symptoms worse | Try cutting back for two weeks |
| Too little sleep | Tiredness can worsen symptoms, which then worsen sleep | A regular sleep schedule |
Why iron gets so much attention
Iron is needed for the brain chemicals involved in movement, and low iron is strongly linked with RLS. That’s why doctors often check your iron and ferritin, a measure of your iron stores, early on. But don’t start iron pills on your own. The NIH Office of Dietary Supplements notes that too much iron can be harmful, and iron supplements can cause stomach upset and interact with some medicines. Test first, then treat if needed.
A calmer-legs evening routine
Mayo Clinic suggests several lifestyle steps that may ease symptoms. Try this sequence for two weeks:
| Time | What to do |
|---|---|
| Afternoon | Last coffee, tea, energy drink, or chocolate before about midday |
| Early evening | Moderate exercise, such as a walk. Avoid hard workouts close to bedtime, which can make symptoms worse for some people. |
| 1 hour before bed | A warm bath and a gentle leg massage |
| When sitting | Choose activities that keep your mind busy, such as a puzzle or a book, and get up to stretch when the urge starts |
| Bedtime | Same time every night. Try warm or cool packs on your legs if they help. |
Limiting alcohol and not smoking may also help.
Track your symptoms for two weeks
| Date | When it started | How bad (0–10) | Caffeine, alcohol, or new medicine? | Minutes it delayed sleep |
|---|---|---|---|---|
| Oct 3 | 9:30 p.m., on the couch | 7 | 2 coffees, glass of wine | 40 |
Bring the log to your doctor. It shows how much RLS affects your sleep, which helps decide whether to treat it.
What about magnesium?
Magnesium is often suggested online for restless legs and cramps. Research on magnesium for RLS is limited and hasn’t shown a clear benefit. The NIH Office of Dietary Supplements notes that high doses of magnesium from supplements can cause diarrhea and stomach cramps, and that people with kidney problems are at higher risk of side effects. Ask your doctor before trying it.
Restless legs in different seasons of life
If you’re pregnant
RLS is common in pregnancy, especially later on, and usually improves after delivery. Ask your provider about checking your iron, and don’t start supplements or medicines without their advice.
If you have kidney disease or diabetes
Both are linked with RLS and with nerve problems that can feel similar. Mention leg symptoms at your next visit.
If you take antihistamines to sleep
Some sleep aids contain antihistamines that can make RLS worse. Ask your pharmacist about alternatives.
If your legs cramp and tighten instead
That’s more likely night leg cramps, which have different causes and fixes. Our next guide on night leg cramps explains the difference.
When restless legs need a doctor
See a doctor if restless legs disrupt your sleep regularly, leave you tired during the day, or affect your mood or work. Doctors can check for causes, correct low iron, and prescribe medicines when lifestyle steps aren’t enough. Also mention it if symptoms spread to your arms, start earlier in the day, or get stronger over time.
Tonight’s experiment
Skip caffeine after lunch today, take a warm bath an hour before bed, and massage your calves for a few minutes. Then start the two-week log. At your next appointment, ask one question: “Can we check my iron and ferritin?”
If what you feel at night is more of a sudden painful knot than a restless urge, read our next guide on night leg cramps and how to stop them.
