Imaginary Diseases is an album of material by Frank Zappa from the Petit Wazoo tour of 1972.

It is one of two finished CD projects from the tour containing material mastered by Zappa before his death.

The name of the album is derived from a lyric in the Apostrophe (') (1974) song "Stink-Foot".

All tracks written, composed and arranged by Frank Zappa.

Mastered by Doug Sax & Robert Hadley Liner notes by Steve Vai.