The short explanation
What you describe sounds like restless legs, an uncomfortable urge to move the legs, usually in the evening or at night, that eases with movement. It is common in later pregnancy and often settles after delivery. Low iron is one possible contributor, and iron needs are high in pregnancy, so your doctor may check your haemoglobin and ferritin. Things some women find helpful include gentle walking during the day, stretching the calves before bed, a warm foot soak, massage, and avoiding tea or coffee later in the day. Please do not take any medicine for this without asking your obstetrician first.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Leg cramps, which are sudden painful tightening of the calf, are different from restless legs, though both are common in pregnancy.
- One leg that is swollen, red, warm or painful is not restless legs and needs to be checked urgently, because blood clots are more likely in pregnancy.
- Poor sleep in pregnancy is tiring; resting during the day when you can may help.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This cannot confirm what is causing your symptoms. Your doctor can examine you and check your iron level.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- Could this be restless legs, and is my iron low?
- What can I safely do to ease it?
- Will it go away after delivery?
- What signs in my legs should make me come in urgently?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Emergency — call 112 now
- Call 112 if you have sudden breathlessness or chest pain, which can happen with a blood clot.
Get help the same day
- Get care the same day if one leg is swollen, red, warm or painful.
Raise it at a routine appointment
- Mention the leg symptoms at your next antenatal visit and ask about an iron test.
Sources
The evidence this explanation is built on.
- Restless legs syndrome NHS
- Restless legs MedlinePlus (US National Library of Medicine)
- Iron deficiency anaemia NHS
Who wrote and reviewed this
Every AskHer answer names its author. A clinically reviewed answer also names the clinician who signed it off — if no clinician is named below, it has not been clinically reviewed.
- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
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No corrections have been made since this answer was first published.
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