Bad Obsession is a blues-rock composition co-written by Guns N' Roses guitarist Izzy Stradlin and the band's frequent collaborator West Arkeen during the mid-1980s. The song serves as a sardonic, harrowing account of drug addiction and actually predates Mr. Brownstone from Appetite for Destruction, making it one of the earliest compositions in the Guns N' Roses catalog to address the subject, though it was not officially released until Use Your Illusion I in 1991. The composition is built on a swaggering boogie groove that draws heavily from the Rolling Stones and Aerosmith, with slide guitar driving much of the harmonic character. The original studio arrangement is distinguished by the guest contributions of Michael Monroe from Hanoi Rocks, who performs both harmonica and tenor saxophone, adding a raw, feverish texture that amplifies the song's blues-rooted intensity. Stradlin and Arkeen's collaborative relationship produced several notable Guns N' Roses tracks, including It's So Easy, The Garden, and Yesterdays, but Bad Obsession stands apart for its unflinching autobiographical content. Band members including Rose and McKagan described the lyrics as an exercise in objective self-reflection on their collective struggles with substance abuse. Stradlin himself kicked his heroin habit following a 1989 arrest, and his departure from Guns N' Roses in November 1991 was partly motivated by frustration with his bandmates' ongoing issues. The song has been performed over two hundred times in the band's live shows across multiple decades.