Insomnia, or sleep disorder, refers to the inability to fall asleep or stay asleep, resulting in sleep deprivation. It is also known as disorder of falling asleep and maintaining sleep (DlMS). It is manifested as difficulty in falling asleep, intermittent and incoherent, while waking up prematurely and not being able to go back to sleep after waking up, having sleep deprivation, general weakness and tiredness feeling, mostly due to poor health, pain, sensory discomfort, disrupted physiological rhythm and sleep environment, etc. There are also insomnia due to fear of sleep. It is a common disease caused by various reasons such as difficulty in falling asleep, short sleep depth or frequency, early awakening and insufficient or poor quality sleep time. Insomnia often causes great pain and psychological burden to patients, and can damage other aspects of the body due to the abuse of insomnia medications. However, there are many ways to relieve and treat insomnia. The following are some of the causes of insomnia, patients can refer to understand the condition in order to treat! 1. environmental causes: common are sudden changes in the sleep environment. 2. individual factors: bad habits, such as drinking tea, coffee, smoking before bedtime. 3. somatic causes: broadly speaking, any physical discomfort can lead to insomnia. 4. Mental factors: including the excitement caused by a special event, the opportunity insomnia caused by worry. 5, emotional factors: emotional disorder can lead to changes in the state of mind, this change will be especially in the emotional instability, it can be caused by some sudden events, such as special happy or special sadness, anger, etc. can lead to insomnia. This kind of insomnia caused by unexpected events is only a phenomenon, which may happen accidentally and temporarily; while more serious insomnia is a long-term phenomenon of poor sleep, their emotions are continuously in a low state, tension, fear, worry, doubt, anger, hatred, depression, anxiety and other emotions not only occupy their sensory organs during the day, but even at night they still can’t stop. 6, sleeping pills or Withdrawal reactions in alcoholics