The main reasons for bad sleep at night are the following: 1, excessive work pressure and excessive mental tension in daily life may cause bad sleep at night, is a kind of transient insomnia, adjust the mindset of the sleep situation will be alleviated. 2, the usual rest time is irregular, the biological clock is very chaotic people can also lead to insomnia. 3, insomnia may be related to the sleeping environment, such as going to school in the field, going out. 4, insomnia may also be related to disease, such as hyperthyroidism, usually pay attention to relaxation, do not exert pressure, maintain a regular rest time, do not stay up late, do not drink coffee, tea, etc. before going to bed. 5, if suffering from anxiety, depression or neurasthenia can also cause poor sleep, may cause headaches, dizziness, such as the emergence of such conditions recommended to go to the hospital for treatment in a timely manner.