There is no single reason for the occurrence of addiction as a disease. A significant role is played by biological, psychological and social factors .
The leading biological factor is a genetic predisposition (heredity). If one of the relatives has been addicted, then the likelihood of addiction increases. Naturally, burdened heredity is not a sentence, but such a person should be mindful of his vulnerability and observe precautions.
Psychological factors of the emergence of addiction are those character traits that prevent us from finding comfort in the real world, harmoniously treat ourselves and others, and create warm, trusting relationships. Addictive behavior is characteristic of people with poor tolerance of psychological difficulties, who are difficult to adapt to a quick change in life circumstances, who tend to achieve faster and easier psychophysiological comfort. In other words, these are the features that make a person seek harmony in the virtual reality of intoxication or a certain form of behavior, and not change something in themselves, in their system of relations with others and the world as a whole.
Social predisposing factors are diverse, they include what is imposed in the form of ideals by the media, as well as the traditions and customs of society, the opinion of peers. One of the most important factors is family upbringing, because it is it that lays the so-called life scenario.
Many people try to self-medicate with the help of alcohol and drugs, adjusting their mental and physical condition (improving mood, reducing anxiety, relieving fatigue, restoring sleep). This is a direct path to the formation of dependence - it only temporarily solves the problem, and subsequently makes it worse.
Now scientists suggest that the basis of any dependencies, both chemical and behavioral, is the lack of the neurotransmitter dopamine in the "reward system" of the brain. This leads to the search for substances or actions in which it is released and a feeling of pleasure arises. The most rapidly forming chemical addictions.
This is due to the fact that narcotic substances directly act on the "reward system" and lead to the release of large amounts of dopamine. Getting rid of such addictions is a long and difficult healing and rehabilitation process.