It is a very unpleasant feeling that makes you feel you must move your legs to get rid of the sensation. And the only way to get rid of it is to move your legs or walk about. Yes, that's exactly it. No, experts think it is probably caused by an imbalance of chemical transmitters in a small area of the brain or spinal cord, but no one really knows. In three-quarters of sufferers, the condition is inherited.
Some people have restless legs only when they are pregnant, or find pregnancy worsens it.
Stress, fatigue, smoking, caffeine and alcohol can all make it worse. Stopping smoking could help. The caffeine in coffee and strong tea makes restless legs more likely, so try cutting them out to see if the problem improves. Similarly, try to decide whether alcohol might be a factor in your case. Dealing with stress is easier said than done - try your public library for books or tapes on relaxation techniques.