The disorders that affect the sleep pattern of a person are referred to as sleep disorders. They negatively affect the normal physical, mental, social and emotional functioning of the person. Some of the common sleep disorders are bruxism, catathrenia, delayed sleep face disorder, hypopnea syndrome and idiopathic hypersomnia. The patient experiences involuntary grinding and clenching of teeth while sleeping in bruxism. Catathrenia causes nighttime groaning during exhalation. Delayed sleep phase disorder is an inability to awake and fall asleep at socially acceptable times. Sleep disorders are commonly diagnosed with the help of tests such as polysomnography and actigraphy. The treatment of sleep disorders depends on the diagnosis, the patient's medical and psychiatric history as well as the patient's preference. This book provides comprehensive insights into the field of sleep disorders. It presents researches and studies performed by experts across the globe. Those in search of information to further their knowledge will be greatly assisted by this book.