The patient suddenly cannot sleep, the reason may be the following aspects: 1, whether the patient suffered a major mental, psychological trauma or psycho-psychological factors stimulation caused. Some things make the patient more worried, excited, anxious, may cause the patient suddenly can not sleep. 2, if the patient sleeps too much during the day, it is also easy to cause the patient suddenly can not sleep at night. 3, the patient suddenly can not sleep, may be related to activities, such as watching the plot of the more intense, exciting film and television drama at bedtime. 4, eating strong tea, strong coffee, etc. Excitatory drinks, resulting in the cerebral cortex in a state of excitement, also prone to sudden sleeplessness.