Alcohol use disorder is thought to occur due to changes in the brain’s reward circuit after repeatedly drinking alcohol, as this produces a positive response in the brain; it is also thought to result from changes in the brain itself as it adapts to repeated alcohol drinking. There are various genetic, psychological, and environmental factors which can increase the risk for the disorder, such as:
• alcohol use in childhood and adolescence
• having first degree relatives with alcohol use disorder
• parental alcohol use
• history of traumatic events
• having a personality disorder or other psychiatric conditions like depression and anxiety disorders