Restless Leg Syndrome refers to a feeling of discomfort in the legs along with an inability to control their movement; this is usually worse at night. There is often a genetic cause.
Increasing iron intake during pregnancy and bed-time leg massage may help. Some health care providers suggest taking 500 mg of Magnesium prior to bed for 2 weeks.
Zolpidem (Ambien®) is a sleeping pill that is safe in pregnancy and can be used at times.