This condition involves "creepy-crawly" sensations, mainly in the legs but occasionally in the arms and trunk. The sensations have the following features: - Occur during periods of inactivity - Become more severe at night - Are tied to an overwhelming urge to move the limb - Are sometimes relieved by movement of the limb - Often cause difficulty staying or falling asleep, leading to fatigue.

	Insomnia The Condition "...Causes & Development Primary insomnia is not due to any other sleep disorders such as restless legs syndrome, medical conditions, drugs or mental disorders..."

Last updated: May 10, 2007