Parasomnia is a neurological disorder that refers to abnormal behavior during sleep. This disease has received increasing attention and research over the past few decades. In the 1950s, the symptoms of parasomnia were first described and further studied. This paper describes the three classifications of parasomnias, and details the symptoms and treatment options for these three classifications. By reading and analyzing the previous literature, it can be concluded that the types of parasomnia can be roughly divided into circadian dysrhythmia sleep disorder, sleep apnea syndrome, and restless leg syndrome. Circadian dysrhythmia sleep disorder is characterized by late sleep, insufficient or excessive sleep duration, resulting in daytime fatigue, a lack of concentration, and other symptoms. The treatment method is light therapy. The main symptom of sleep apnea is that breathing stops during sleep, resulting in a lack of oxygen supply. The treatment is to improve the maxillofacial structure through surgery to reduce the problem of dyspnea. The most obvious symptom of restless leg syndrome is discomfort and unbearable numbness in the lower legs and feet while sleeping. There are three ways to treat this condition. A more non-pharmacological treatment is to do some exercise to reduce the discomfort of the leg muscles, a medical treatment is to give the patient levodopa, and if the syndrome is caused by a lack of iron in the body, iron supplementation is sufficient.