Alcohol dependence (syndrome), commonly known as alcohol addiction, refers to the psychological and somatic dependence of long-term drinkers on alcohol. Psychological dependence or mental thirst means that people who stop drinking or reduce drinking will feel restless, anxious, irritable, listless, and try every possible way to find alcohol to drink; somatic dependence means that once long-term drinkers stop drinking or reduce drinking, their bodies will produce a lot of discomfort, such as panic, headache The body is physically dependent on alcohol. Another characteristic of alcohol dependence is that the amount of alcohol consumed is increasing and tolerance is increasing. Generally speaking, it takes several years to decades to reach the level of alcohol dependence. Many people know that drinking too much is harmful to their bodies, but they are unable to control themselves. If they occasionally reduce the amount or do not drink, they will feel uncomfortable, restless, or have symptoms such as tremors, nausea, vomiting, sweating, etc., so they must drink alcohol to relieve their discomfort. Alcohol dependence is a type of substance dependence, which is medically defined as a chronic encephalopathy. Alcohol-dependent people are unable to control their drinking behavior and drink compulsively and regularly, which leads to physical and mental problems.