The working mechanism of sympathetic nerve and parasympathetic nerve in human body is different. The stimulation of sympathetic nerve makes people excited, and the stimulation of parasympathetic nerve makes people quiet. Staying up late destroys this working mechanism. At night, the sympathetic nerve is excessively excited, and the next day, it will cause dizziness, headache, listlessness and memory loss. After a long time, it may be neurasthenia.

Therefore, going to bed on time is not because the organs have to detoxify, but to avoid getting fat, ugly and stupid, and the body's immunity is getting worse.