In Spring 2017, Uniform was asked to support fellow noisy, boundary-pushing duo The Body for a European tour. Having been longtime fans of the band, Uniform vocalist Michael Berdan and guitarist Ben Greenberg jumped at the opportunity. During the planning phase of the tour, Berdan and Lee Buford from The Body started corresponding regularly. Ultimately, Berdan asked Buford if he and The Body cofounder Chip King would be interested in making a collaborative record with Uniform. Buford enthusiastically assented, and the seed of Mental Wounds Not Healing was sown.
The title of the record is a line stolen from the chorus of Ozzy Osbourne's "Crazy Train." Most of the titles are culled from horror literature and cinema, with specific nods to Shirley Jackson, Jack Ketchum, and Elem Klimov. Thematically, the songs have to do with feeling trapped in one's own mind, projecting images over and over again of a future in shambles before it even gets a chance to happen. It is about hopelessness, anxiety, and depression so familiar that they seem like permanent fixtures of one's psyche and identity.