Edwige Fenech's real voice is used throughout the entire film in the English-language version (shot in 100% sync sound). This is a rarity for her speaking in her own voice as her previous roles are dubbed by professional voice actresses.
Although uncredited, composer Pino Donaggio's song "Wild Dawn Nights" from his earlier film SAVAGE DAWN is reused here in the background during the party scene after the opening credits sequence.
The scene of Inspector Datti (Donald Pleasence) running and screaming in the town square was filmed guerilla style with hidden cameras all around the square. It was shot in one take.
In Brazil, the film is known by two different titles, The Face / A Face in VHS and Bloody Transformation / Transformação Sangrenta in DVD.
Italian censorship visa # 83223 delivered on 13-1-1988.