From a neuroscience perspective, addiction is a chronic brain disorder marked by changes in brain circuits that regulate reward, motivation, memory, and inhibitory control. These changes underlie the compulsive drug use and relapse seen in addiction. Scientists emphasize that while some brain changes may improve with abstinence, many persist, making addiction a lifelong challenge that requires ongoing management. This view drives research into treatments aiming to restore brain function or compensate for these deficits.