The inability to sleep at night can be diagnosed as insomnia, which is caused by excessive mental excitement, stress, physical discomfort due to other physical illnesses, sleep disorders, and the use of stimulating foods or drugs before bedtime. The danger of insomnia to human physical and mental health should not be underestimated, which can lead to increased blood pressure, poor mental health, fatigue, lack of concentration, memory loss, irritability and irritability, depression, etc. Serious cases can lead to sudden death. To change the bad habits in life, to develop good habits, regular life and rest, to ensure 6-8 hours of sleep a day, to avoid disruption of the biological clock, do not watch too tense, horror TV before bed, avoid eating spicy, stimulating, excitatory food, containing caffeine, amphetamines, such as strong tea, coffee or drugs. Regularly participate in outdoor sports, and do not exercise too much at night.