PLM occurs most often when a person is asleep and movements are unconscious. People suffering from PLM may feel sleepy, have insomnia, or their limbs may feel tired during the day. RLS occurs only when a person is awake and is a voluntary response to uncomfortable or painful feelings in the limbs. This sleeping disorder plagues one out of every three Americans. Symptoms include trouble initiating or sustaining sleep and depression or irritability.
Insomnia disturbs a person's waking hours as well as their sleeping hours.
Parasomnia Parasomnia refers to a wide variety of disruptive sleep-related events. Behavior could include confusional arousals, sleepwalking or sleep terrors. These behaviors and experiences occur usually while sleeping, and are most often infrequent and mild. They may, however, happen often enough or become so bothersome that medical attention is required. In some cases people suffering from this sleeping disorder may complain of heartburn.