Why is restless leg syndrome common during pregnancy?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Restless leg syndrome (RLS) during pregnancy is a common condition that causes an uncontrollable urge to move the legs, often accompanied by uncomfortable sensations. It typically results from pregnancy-related changes in the body, including hormonal fluctuations, low iron or folate levels, and increased blood volume. Symptoms are usually most intense in the third trimester and often improve after delivery.

If you're experiencing these symptoms, it's important to understand what's driving them. Iron deficiency, thyroid issues, and other treatable conditions can mimic or worsen RLS, and identifying the cause early can help you find relief faster. Take a free, instant, online symptom check to better understand your symptoms and confidently plan your next steps.

Reviewed for medical accuracy: 07/14/2026

Important Next Steps

Learn if restless legs need medical care Discover possible causes of restless leg symptoms See whether pregnancy-related leg discomfort is serious Find OTC options for restless leg relief Find a doctor for restless leg syndrome Understand safe home remedies for restless legs Find out what’s causing your leg restlessness

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Explanation

Restless leg syndrome (RLS) often happens during pregnancy. This is because a woman's body goes through many changes.

Reasons for RLS in Pregnancy:

Hormonal Changes: Pregnancy causes changes in hormones like estrogen. These changes potentially may make RLS more likely.
Iron Levels: Pregnant women might have lower iron levels. Iron is important for the brain to work well, and low iron can cause RLS.
Sleep Changes: Pregnant women often have trouble sleeping, and this can make RLS worse.

What is RLS?

RLS makes your legs feel uncomfortable. You might feel like you need to move them a lot, especially at night.
It can make it hard to sleep and rest.

If you're experiencing uncomfortable leg sensations or other symptoms during pregnancy, you can use a free symptom checker to help understand what might be causing them, and talk to a doctor or healthcare provider for more information.

(References)

Gupta R, Dhyani M, Kendzerska T, Pandi-Perumal SR, BaHammam AS, Srivanitchapoom P, et al. (2016). Restless legs syndrome and pregnancy: prevalence .... Acta neurologica Scandinavica, 26482928.
Srivanitchapoom P, Pandey S, & Hallett M. (2014). Restless legs syndrome and pregnancy: a review. Parkinsonism & related disorders, 24768121.
Manconi M, Govoni V, De Vito A, Economou NT, Cesnik E, Mollica G, & Granieri E. (2004). Pregnancy as a risk factor for restless legs syndrome. Sleep medicine, 15165540.

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