Ouch may refer to:

• An interjection that denotes pain
• A socket into which a precious stone fits
• "Ouch" (song), a 2008 single by N-Dubz
• Ouch!, a 1980 album by Lake
• "Ouch!" (song), a song by The Rutles
• Ouch! (gum), a brand of bubble gum from Hubba Bubba
• Ouch, Pakistan, a town in Lower Dir District
• Organization for Understanding Cluster Headaches (OUCH), a non-profit organization that assists cluster headache sufferers and their families
• Ouches, a commune in the Loire department in central France

The Organization for Understanding Cluster Headaches (O.U.C.H.) was a 501(c)(3) non-profit organization that assisted cluster headache sufferers and their families by providing information and emotional support. O.U.C.H. also supported and participated in research and communicated with the medical and pharmaceutical communities with the goal of improving diagnosis and treatment of cluster headaches.

Ouch! is the fourth studio album by Lake, released in 1980 in Germany and 1981 in the USA. It is the first album to be released following the departure of three members of the band from their peak period, Detlef Petersen, Geoffrey Peacey, and Martin Tiefense, who were replaced by Frank Hieber, Achim Opperman, and Heiko Efferz.