Sleep Apnea: This disorder causes people to stop breathing periodically throughout the night. Insomnia: Insomnia makes it hard for people to fall or stay asleep depending on which type they have. Restless Legs Syndrome: It creates an urge for people to move their legs or feel other strange sensations like itching, tingling, or burning.Periodic Limb Movement Disorder: PLMD occurs during non-REM sleep and is characterized by involuntary muscle spasms.Parasomnias: physical or verbal behaviors that happen during sleep such as teeth grinding and clenching, sleepwalking, and bedwetting