Insomnia, one of the more common manifestations of sleep disorders. Normal human sleep is affected by a variety of factors, such as the surrounding environment, the nature of work, lifestyle habits, emotions, and even sleeping position, all of which can affect sleep. Therefore, many people have experienced insomnia. But occasionally one or two insomnia is not a case of insomnia, so what is insomnia? There are two common types: one is difficulty falling asleep and unstable sleep. Doctors often refer to this type of insomnia figuratively as owl-like sleep. While the average person has a sleep process of about 15 to 30 minutes, this type of person has difficulty falling asleep, often for more than an hour. The second is short sleep and early awakening. Doctors often refer to this type of insomnia figuratively as cuckoo-type sleep. Such people often sleep very shallowly and wake up at three or four o’clock in the morning, and have difficulty falling asleep again. If the above symptoms occur frequently, or even cannot sleep without sleeping pills, then you are suffering from insomnia. The common causes of insomnia are as follows: Psychological factors: anxiety caused by psychological conflicts, excessive thinking, tension, excitement, etc. Physiological factors: changes in the sleep environment, or disruption of the rhythm of the sleep cycle, such as travel by train or airplane, night shifts, etc. Disease factors: Some chronic diseases can cause cortical dysfunction and neurasthenia-like symptoms, such as insomnia. Physical discomfort, such as pain, itching, coughing, etc., can also cause insomnia. Dietary and drug factors: being too full or hungry, drinking strong tea or coffee, drinking alcohol or taking excitatory drugs can make the brain overexcited and cause insomnia. Frequent insomnia can make a person’s memory and mental activities affected, bringing some disadvantages to work, study and life. However, insomnia can be cured as long as the causes of insomnia are carefully identified, the work and rest schedule is reasonably arranged, the interference of mental factors is removed, and certain medication is given.