It is possible that the following reasons may be caused by rumination before going to bed: first, it may be due to excessive anxiety, nervousness, especially the problem of anxiety disorders, it is easy to sleep with special anxiety, and even have some anxiety, rumination, always thinking about bad things and other problems performance. Secondly, it may also be due to the problem of depression, especially depressed mood, happy, then it is easy to think about some bad things, especially thinking about the previous painful experience, etc.. Finally, it may also be because of the recent period of stress, encountered a lot of stressful events, such as family emotional discord, work and economic pressure is particularly high, and even encountered some traumatic events, such as fires, earthquakes, accidents and a series of problems, the above reasons are likely to make people before going to bed to think nonsense.