On “Allergic,” Post Malone contrasts an energetic beat with hard-hitting drums in the verses with slow guitar melodies during the chorus.

The track describes an “impossible love,” and Post details a toxic relationship which involves constantly breaking up and getting back together and drug use. Within the verses, Post reflects on the sad truth that his lover may be one of his demons.

The track is set to be sent to alternative radio on September 24, 2019 as the fourth single from Hollywood’s Bleeding, being the predecessor of “Circles,” released in back in late August this year.