What is the meaning to Nightmare by Avenged Sevenfold?

The song delves into a personal battle through addiction. The protagonist reflects on a turbulent journey marked by darkness, struggle, and haunting memories that persist like inescapable nightmares. He explores his inner demons trying to make sense of a world turned chaotic due to these struggles.

The protagonist grapples with the concept of hope amid his inner turmoil, questioning if redemption exist, or if being consumed by the pain. It is a dark song, reflecting inner conflicts that can arise during substance abuse as the individual confronts the devastating impact on themselves and their surroundings.