Sleep is a physiological process and an ability. Insomnia indicates a reduced ability to sleep. At the same time, insomnia is a subjective phenomenon, i.e., a subjective feeling of inadequate sleep or unrecovered mind. This can be due to two reasons: insufficient amount of sleep or poor quality of sleep. Since the amount of sleep needed varies from person to person, sleep that restores energy and stamina as long as the amount of sleep is reduced should not be called insomnia. Insomnia is very common and almost everyone has experienced one or more nights of insomnia, such as when traveling at high speed across several time zones or when changing from day to night shifts, as well as insomnia caused by some radiological factors. Insomnia caused by life events such as changing to a new job, illness of a loved one in the family, etc. can last from a few nights to a month. Insomnia caused by various diseases, including mental illness, physical illness and primary sleep disorders, lasts longer. Other factors associated with insomnia include body shape, personality, and hobbies. Women are more likely to suffer from insomnia than men, and insomnia has been reported to be twice as common in women as in men. Divorcees, widows or widowers, and separated people report more insomnia than single or married people. More than 60 million adults in the United States report difficulty sleeping each year, and 10 to 15 percent report severe or chronic sleep disorders. The Gallup Poll found that half of U.S. adults have sleep disorders. 35% report insomnia and 12% have severe insomnia. Most insomniacs complain of dizziness, fatigue, sleepiness and poor concentration, and some experience muscle pain and mild depression and anxiety. Many people try to use self-medication to solve their sleep problems. Many people use alcohol before bed to promote sleep, or take over-the-counter medications, or buy their own hypnotics. It is important to note that alcohol does not promote sleep for everyone, but can make sleep lighter and more intermittent for those who drink, and taking medications not prescribed by a specialist can be more harmful, including causing intoxication and drug dependence. Patients suffering from insomnia symptoms, in addition to finding a specialist to take medications prescribed by a doctor, can also perform some behavioral training to help relieve insomnia. According to relevant data, the ratio of alpha and beta waves of brain waves in insomnia patients has changed. 2~3 courses of treatment by A620 brain function diagnostic therapy instrument play a similar therapeutic effect of drugs on insomnia relief, but avoid the adverse effects of some drugs.