From Wikepedia: "Hesitation Blues" is a popular song adapted from a traditional tune. One version was published by Billy Smythe, Scott Middleton, and Art Gillham. Another was published by W.C. Handy as "Hesitating Blues". Because the tune is traditional, many artists have taken credit as writer, frequently adapting the lyrics of one of the two published versions. Adaptations of the lyrics vary widely, though typically the refrain is recognizably consistent. The song is a jug band standard and is also played as blues and sometimes as Western swing.