The main effect of melatonin is to regulate the biological clock of human body and induce sleep, while taking melatonin products in large quantities for a long period of time may form dependence, in addition, it is also prone to lead to elevated blood pressure, sleep disorders, and disorders of the endocrine system. Melatonin is one of the hormones secreted by the pineal gland of the brain, which can regulate the biological clock and induce sleepiness quickly. The secretion of melatonin is characterized by active secretion at night and inhibited secretion during daytime, so due to the disorders of biological rhythm affecting the secretion of melatonin or the decrease of melatonin secretion caused by ageing, you can take some melatonin products to improve your sleep. Melatonin products on insomnia just have some improvement effect, not suitable for all insomnia people, such as poor sleep quality or easy to wake up and other people, take melatonin products after the effect is smaller. Therefore, when taking melatonin, it must be used under the guidance of a doctor, and must not be taken blindly by yourself, so as not to produce some side effects, such as addiction, elevated blood pressure, sleep disorders, endocrine system disorders. Treatment of insomnia, it is recommended to adjust the lifestyle, such as try to go to bed early and get up early, regular sleep, bedroom as much as possible to use soft warm light, turn off all light sources before going to sleep, and change the curtains to blackout curtains, so as not to interfere with the outside light sleep, while trying to stay away from cell phones, TV, tablet and other electronic devices before going to bed.