Addiction is a complex condition, a brain disorder that is manifested by compulsive substance use despite harmful consequences. People with addiction (severe substance use disorder) have an intense focus on using a certain substance(s), such as alcohol or drugs, to the point that it takes over their life. The signs of addiction include cravings, loss of control over substance use, continued use despite negative consequences, and withdrawal symptoms when trying to quit.

However, addiction is not limited to substances; it can also involve behaviors such as gambling, gaming, or even excessive use of the internet or social media. The underlying causes of addiction can be biological, psychological, and social, and its treatment often involves a combination of therapy, medication, and support groups.

Understanding addiction as a health issue rather than a moral failing is crucial in providing effective support and treatment for those affected.