"Blood Sweat & Tears" is a song recorded in two languages by South Korean boy band BTS. It was written by "Hitman" Bang, Kim Do-hoon, RM, Suga, J-Hope, and Pdogg, with the latter of the six solely handling production. The Korean version was released on October 10, 2016, as the lead single from the band's second studio album, Wings (2016), by Big Hit Entertainment. The Japanese version of the song was released on May 10, 2017, through Universal Music Japan, as a single album that included the B-side tracks "Spring Day" and "Not Today", both also in Japanese. It is a moombahton, trap, and tropical house song with influences of dancehall and reggaeton. The song's lyrics address the pain of addictive love.

BTS, also known as the Bangtan Boys, is a South Korean boy band formed in 2010. The band consists of Jin, Suga, J-Hope, RM, Jimin, V, and Jungkook, who co-write or co-produce much of their material. Originally a hip hop group, they expanded their musical style to incorporate a wide range of genres, while their lyrics have focused on subjects including mental health, the troubles of school-age youth and coming of age, loss, the journey towards self-love, individualism, and the consequences of fame and recognition. Their discography and adjacent work has also referenced literature, philosophy and psychology, and includes an alternate universe storyline.