Restless Legs Syndrome
Restless legs syndrome (RLS) — an uncomfortable urge to move the legs, usually worse at night and in the evening — affects up to 26% of pregnant women, making it a common cause of sleep disruption.
What "Moderate" Means Here
A "moderate" rating means this symptom is common but is more likely to benefit from your provider’s input — either to confirm it’s within the normal range for you, to rule out an underlying cause, or to get a treatment recommendation beyond basic home remedies. It doesn’t necessarily mean something is wrong; many moderate symptoms are simply worth mentioning at your next appointment so your provider has full visibility into how your pregnancy is progressing. If it escalates in intensity or frequency, that’s a good reason to reach out sooner rather than waiting for your next scheduled visit. Providers generally appreciate patients flagging moderate symptoms proactively rather than waiting to see if they resolve, since the same symptom can mean different things depending on your individual health history, prior pregnancies, and how far along you are.
Timing During Pregnancy
This symptom is most often reported later in pregnancy. Third-trimester symptoms are frequently related to the growing uterus placing more pressure on nearby organs, joints, or blood vessels, or to the body preparing for labor. Because late-pregnancy symptoms can occasionally overlap with signs of labor or other conditions specific to the third trimester, it’s worth reviewing the "when to call your doctor" guidance below a bit more closely as your due date approaches. Many providers also schedule more frequent visits in the third trimester specifically so that new or worsening symptoms can be caught and addressed quickly.
Common Causes
- Iron and folate deficiency — the most important contributors in pregnancy
- Dopamine pathway disruption by pregnancy hormones
- Genetic predisposition
- Third-trimester hormonal changes
- Spinal and pelvic changes compressing nerves
- Circulation changes that may trigger nerve sensations
Remedies That May Help
Iron Supplementation
If iron levels (ferritin) are low, iron supplementation significantly improves RLS symptoms. Ask your provider to check iron status.
Leg Stretches Before Bed
Calf stretches and thigh stretches reduce nighttime leg restlessness.
Warm Bath Before Sleep
A warm bath relaxes leg muscles and can reduce RLS symptoms at bedtime.
Leg Massage
Deep massage of the calves and thighs before bed can ease the sensation.
Avoid Caffeine and Antihistamines
Caffeine and some antihistamines worsen RLS symptoms.
Light Evening Walking
Gentle exercise in the evening can reduce RLS onset, though intense exercise may worsen it.
When to Call Your Doctor
- RLS symptoms are severely disrupting your sleep every night
- You suspect iron deficiency — ask for a ferritin level test
- Your symptoms continue or worsen significantly postpartum
- You also have periodic limb movements during sleep (involuntary leg jerks)
Warning Signs That Always Warrant Immediate Care
Regardless of the specific symptom you’re looking up, general ACOG and CDC guidance is to seek immediate medical attention — call your provider’s urgent line, go to labor and delivery, or go to the ER — if you experience any of the following:
- Vaginal bleeding that is heavy, bright red, or accompanied by pain
- Severe or persistent abdominal or pelvic pain
- A severe headache that doesn’t improve with rest, water, or over-the-counter pain relief
- Sudden swelling of the face, hands, or feet, especially paired with a headache or vision changes
- Vision changes such as blurring, seeing spots, or temporary vision loss
- A noticeable decrease in your baby’s movement compared to their usual pattern
- Fever of 100.4°F (38°C) or higher
- Fluid leaking or gushing from the vagina
- Regular, painful contractions before 37 weeks
- Difficulty breathing, chest pain, or a rapid heartbeat
- Persistent vomiting that keeps you from keeping down fluids
- Severe itching, especially on the palms and soles, which can sometimes indicate a liver-related condition
This list reflects general warning signs recognized across pregnancy, not just for this specific symptom — when in doubt, it’s always appropriate to call your provider and describe what you’re experiencing rather than waiting to see if it resolves.
General Tips for Managing Pregnancy Symptoms
Alongside any symptom-specific remedies above, a handful of general habits tend to help with a wide range of pregnancy symptoms and are worth keeping in mind throughout your pregnancy:
- Stay consistently hydrated — many pregnancy symptoms, from headaches to fatigue to constipation, are worsened by even mild dehydration.
- Keep taking your prenatal vitamin as directed, since nutrient gaps (particularly iron, calcium, and vitamin D) can compound certain symptoms.
- Prioritize rest and sleep where you can, including resting on your side in later pregnancy, which supports circulation to the uterus.
- Stay gently active if your provider has cleared you for exercise — light movement like walking or prenatal yoga can ease many common complaints.
- Eat smaller, more frequent meals rather than three large ones, which can help with digestive symptoms and blood sugar swings.
- Keep a running list of questions between appointments so nothing gets forgotten when you do see your provider.
None of these general habits replace medical evaluation for a specific concerning symptom, but they’re a reasonable baseline to maintain throughout pregnancy regardless of what you’re experiencing.
Frequently Asked Questions
What does restless legs feel like during pregnancy?
It is typically described as a crawling, creeping, tingling, or itching sensation deep in the legs that creates an irresistible urge to move. It is relieved temporarily by moving.
When does RLS start in pregnancy?
It most commonly starts or worsens in the second and third trimesters, peaking around weeks 30–38.
Is pregnancy RLS caused by iron deficiency?
Iron deficiency is the most common and treatable cause. Getting a ferritin blood test and treating low iron has the best evidence for improving RLS in pregnancy.
Will RLS go away after I give birth?
In most cases, pregnancy-related RLS resolves within weeks to a few months after delivery. In some women it persists, especially if the underlying iron deficiency is not treated.
Are there safe medications for RLS in pregnancy?
The first-line approach in pregnancy is non-pharmacological. Iron supplementation (if deficient) and lifestyle measures are safest. Discuss with your provider before taking any medication.
How do I know if a pregnancy symptom needs medical attention?
As a general rule, contact your provider if a symptom is severe, sudden, rapidly worsening, or paired with other concerning symptoms like fever, vision changes, or reduced fetal movement — even if it doesn’t appear on a specific warning-signs list. You know your body best, and providers consistently say they’d rather field a call about something that turns out to be normal than have a patient wait through something that wasn’t.
Should I track this symptom before my next appointment?
It’s a good habit to jot down when a symptom started, how often it occurs, roughly how intense it feels, and anything that seems to make it better or worse. This kind of record is genuinely useful to your provider — it turns a vague "I’ve been having some discomfort" into something they can actually assess for patterns, and it can help you notice on your own whether a symptom is improving, staying steady, or getting worse over time.
Is it normal for pregnancy symptoms to come and go?
Yes — many pregnancy symptoms fluctuate day to day or even hour to hour, influenced by things like hydration, activity level, meal timing, and simple positional changes. Fluctuation on its own usually isn’t a red flag. What’s more worth flagging to your provider is a symptom that is steadily trending worse over days or weeks, or one that suddenly becomes much more intense than your usual pattern.