"Sudor" (English: "Sweat") is a song by the Mexican singer ThalÃÂa released as the first single of her second album release Mundo de Cristal, in 1991. "Sudor" is the second of four songs in which ThalÃÂa talks about body fluids, the others are "Saliva", "Sangre" and "Lágrimas" from the albums ThalÃÂa, Love and En éxtasis, respectively.
The song was included in the promotional tour for the album Mundo de Cristal, which went through Mexican cities like Acapulco and also in the tour for her 1993's album Love. The song did not receive an official music video but a video was made for the Raúl Velasco's TV show Siempre en Domingo, also a live performance was made when ThalÃÂa was promoting her album Love in a TV special called ThalÃÂa y otras Fantasias by Televisa.
According to the daily paper El Siglo de Torreón, Sudor was one of the most played songs in Mexico in 1992. The song reached number three in Mexico City, number six in Los Angeles and number eight in San Salvador. In the Notitas Musicales chart, Sudor peaked #9 in Mexico.