Alcohol abuse and dependence can be categorized into five types based on patterns of use. It progresses through four phases from social drinking to relieve stress, to loss of control and physiological dependence in phase three. Etiological factors include genetic, psychological, and social influences. Complications affect multiple body systems and lead to medical issues like liver disease as well as social problems. Treatment involves detoxification using benzodiazepines followed by behavioral therapies, medication, and rehabilitation to address the biological and psychosocial aspects of the disorder.