• Restless legs syndrome (RLS) is a disorder that causes a strong urge to move one's legs.

• There is often an unpleasant feeling in the legs that improves somewhat with moving them.

• This is often described as aching, tingling, or crawling in nature.

• Occasionally the arms may also be affected.

• The feelings generally happen when at rest and therefore can make it hard to sleep.

• Due to the disturbance in sleep, people with RLS may have daytime sleepiness, low energy, irritability, and a depressed mood.

REM (Rapid Eye Movement) Sleep Behavior Disorder (RBD) usually refers to a sleep disorder when patients act out their dreams. This can be from as simple as twitching to sleep walking and more involved sleep behaviors.