The song is written in the key of G♭ major with a moderately slow tempo of 78 beats per minute. The song follows a chord progression of C♭–D♭–E♭m, and the vocals in the song span from C♭₄ to C♭₇.

Puddle of Mudd's lead singer Wes Scantlin wrote this about his desire to be a good father and hang with his child. "Blurry" angered Scantlin's son's mother when she first heard the song. She and Scantlin are separated. According to Scantlin, "Blurry" helped bring some issues into the open and improved their relationship.

"Blurry" is one of Puddle of Mudd's most famous songs, reaching the number-one spot on the Billboard Hot Mainstream Rock Tracks and Hot Modern Rock Tracks charts for ten and nine weeks, respectively. This soon propelled the single to mainstream success, reaching the number 5 spot on both the Billboard Hot 100 Airplay and Billboard Hot 100. The song is also the band's highest selling U.S. single ever, with sales of 753,000 copies, as of 2010. Additionally, the song's writers, Wes Scantlin, Doug Ardito, and Jimmy Allen won ASCAP (American Society of Composers, Authors and Publishers) Song of the Year and Pop Song of the Year for this tune. "Blurry" also won 2 Billboard Awards in 2002, for Modern Rock Track of the Year and Rock Track of the Year. It also received the Kerrang! Award for Best Single. "Blurry" reached #8 in the UK Singles Chart on its release there in June 2002, becoming the band's highest charting single in the United Kingdom.

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