Restless legs syndrome (RLS) is a condition that causes an uncontrollable urge to move the legs, usually in the evening or night time hours when you're sitting or lying down. The condition is more common with increasing age and more common in women than in men. Often time’s people with RLS want to walk around and shake their legs (or arms) to help relieve the uncomfortable sensations. Alternative methods like massage and herbs may be beneficial is reliving RLS symptoms.