Patients who are very tired but still can’t sleep may have changed their sleeping environment, for example, some patients may have insomnia when they travel because of the change of jet lag or the change of sleeping environment, and patients may have insomnia when they recognize their beds, and patients who are especially tired and want to sleep but don’t have a good sleeping environment, too much light in the bedroom, interference of noise, the temperature of the environment is too cold or Too hot, all may make it difficult for patients to fall asleep. There are also patients who have poor sleep hygiene habits, such as patients do not have a fixed bedtime, wake up time, no normal sleep pattern patients are likely to have insomnia, so for patients with sleep disorders, it is important to establish good sleep hygiene habits.