Melatonin can improve sleep, melatonin itself is a physiological hormone that normally exists in the human body, there is a circadian secretion rhythm, generally at night 2-3 o’clock is the peak of melatonin secretion. If melatonin secretion is reduced or disrupted, it may cause sleep disorders and changes in sleep rhythm, so it is recommended to develop good sleep habits to facilitate the normal secretion of melatonin. The physiological effects of melatonin can delay aging, scavenge free radicals, improve sleep quality, and complete correction of sleep rhythm. It is generally recommended that patients with sleep disorders can use melatonin or agonists of melatonin receptors, which can help improve sleep to some extent. But at the same time there are many other causes of sleep disorders, such as anxiety, depression, sleep environment and some physical diseases, which need to be treated for their causes.