It is well known that sleep is a daily physiological process that people must perform and it takes up 1/3 of their life. Through sleep, we can recover our strength and brain power. However, with the development of society and the continuous change of people’s habits, sleep disorders are increasing and bringing more and more harm to human society. The survey shows that more than 40% of Chinese people suffer from various sleep disorders, of which insomnia accounts for 10-20%, and what is not optimistic is that only 1/4 of those who can take the initiative to seek medical treatment. There are many kinds of causes of insomnia, including: psychogenic factors, environmental factors Some of these factors can be perceived by people themselves; some of them cannot be discovered by patients themselves, or are not known to be the root cause of insomnia even if they are discovered. For example, periodic physical activity during sleep and restless legs syndrome have been taken seriously by those who study insomnia and are considered to be the main cause of insomnia in some people. The manifestations of these two disorders are described here to provide some help to insomniacs. Periodic limb activity during sleep This condition is most common in middle age and older, especially after the age of 50, and is rare in people under the age of 30. The main manifestation is an abnormal movement of the limbs, especially the lower limbs, that occurs repeatedly and periodically during sleep. The abnormal movements consist of repetitive dorsiflexion of the toes and ankles, often extending to the knees and hips, and sometimes involving the wrists and elbows. These movements occur mainly during the light sleep phase and can occur in some individuals during drowsiness. The annoyance of periodic limb movements makes sleep difficult and even irritable for the patient, causing frequent awakenings, leading to insomnia and sleepiness the next day. Researchers have found that this disease is closely related to amyotrophic lateral sclerosis, peripheral neuropathy, myelopathy, episodic sleeping sickness, and sleep apnea. Dopamine receptor agonists and benzodiazepines are effective. If you suffer from insomnia, you and your family are urged to closely observe your sleep for similar physical activity so that it can be detected in time to seek medical attention.