The main reason why depressed people do not sleep is because they are depressed and happy, because these core symptoms of depression make them suffer, so it is more difficult to fall asleep. The vast majority of depressed patients have sleep problems, and some studies have shown that more than 90% of depressed patients have sleep disorders, the main manifestations of which are difficulty falling asleep, insomnia, short total sleep time, nightmares, early awakening, etc. This kind of depression accompanied by sleep problems is difficult to cure and many times requires medication. In particular, the core reason why depressed patients do not sleep is that they are particularly depressed and unhappy. When they need to sleep, they repeatedly remember the previous unhappy things and even have the phenomenon of rumination, that is, they repeatedly chew and think about the previous particularly painful experiences and life, and even have abnormally enhanced memories of the previous painful experiences. In severe cases, it is accompanied by compulsive thinking, that is, you know you can not think about these things, should not think about these things, but you just can not do it, can not stop, especially before going to bed to repeatedly think about these painful experiences, thus making yourself miserable. If you have the above problems, especially depression accompanied by sleep problems, it is best to actively treat them, such as taking the commonly used agomelatine, trazodone, etc. for effective treatment and intervention.