Sleep disorders influence or disturb the sleep pattern of a person. They are broadly categorized into 3 groups, namely, dyssomnia, circadian rhythm sleep disorders and parasomnias. The most common type of sleep disorder is insomnia, which falls under the category of dyssomnia. A person suffering from this disorder has difficulty in falling asleep or getting adequate amount of sleep. A sleep disorder that causes a frequent need to get up and urinate at night is referred to as nocturia. There are various other sleep disorders such as periodic limb movement disorder, night terror and narcolepsy. They can be caused due to various reasons such as traumatic childhood experiences, heredity and traumatic brain injury. Various treatments and therapies are provided to the person suffering from sleep disorders including music therapy, allergy treatment and melatonin. Music therapy is used to improve sleep quality in both acute and chronic sleep disorders. This book contains some path-breaking studies in the field of sleep disorders. It presents researches and studies performed by experts across the globe. The book will provide comprehensive knowledge to the readers.