Symptoms. The most common symptom is a “creepy-crawly” feeling in the legs. This can happen every night or only occasionally, and the severity can vary from night to night or even from minute to minute. Sometimes this feeling is described as pins and needles or a tingle. In some cases, the arms are affected as well. The disturbing feeling is most often felt at night while lying down, but it can also happen when sitting. Some have relatively mild symptoms, but others describe it as intolerable. The urge to move the legs is overwhelming even though it provides only fleeting relief. Lack of sleep at night due to RLS can cause marked drowsiness, irritability and difficulty in concentration the following day.
