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Secondary Causes of Restless Leg Syndrome


Updated February 24, 2014

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Not all conditions that may lead to RLS are disorders. In fact, being pregnant seems to increase not only the incidence but also the degree of RLS symptoms. In a study of 626 pregnant women, only 10 percent had symptoms of RLS prior to becoming pregnant but this increased to 27 percent during pregnancy. It seemed to worsen in the third trimester. The good news is that the symptoms rapidly improved after delivery. It is not clear what causes the increased frequency of RLS during pregnancy. It may be due to iron or folate deficiency or even because of hormonal changes associated with being pregnant.

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