Insomnia is one of the common symptoms in clinical practice, including difficulty in falling asleep, short sleep duration, easy to wake up early, there are many causes of sudden insomnia, the common causes are mainly the following: 1, physiological factors, such as the consumption of coffee, strong tea and other foods that tend to excite the brain nerves before bed, after overwork or excessive exercise can all appear insomnia, do not need excessive treatment, through adequate rest can be alleviated symptoms. 2, pathological factors, such as cough, frequent urination, easily affect the quality of sleep insomnia, the need to deal with the specific cause of the original disease to treat the cause. 2. pathological factors such as coughing and frequent urination at night, which can easily affect the quality of sleep and cause insomnia, need to be treated according to the specific cause of the primary disease. 3. mental factors, depression, anxiety, neurosis patients with sleep disorders, need to be psychologically guided by a specialist and treated for the primary disease in order to effectively improve the symptoms.