Restless legs syndrome (RLS) is a disorder related to sensation and movement. People with restless legs syndrome have an unpleasant feeling or sensation in parts of their bodies when they lie down to sleep. Most people also have a very strong urge to move, and moving sometimes makes them feel better. But all this movement makes it hard or impossible to get enough sleep.
Restless legs syndrome (RLS) is a disorder of the part of the nervous system that affects the legs and causes an urge to move them. Because it usually interferes with sleep, it also is considered a sleep disorder.