"Aneurysm" is a song by American grunge band Nirvana. The song was released in 1996. It was released in two studio versions, as well as a live version that was featured on the album Muddy Banks of the Wishkah and was released in 1996 as a promotional single.
The first studio version of "Aneurysm" was recorded on 1 January 1991 by producer Craig Montgomery and it appeared on the 1991 single Smells Like Teen Spirit as a b-side. The second studio version of the song was recorded on 9 November 1991 at Maida Vale Studios for Mark Goodier's BBC session and it was first aired on 18 November 1991. A live performance of the song by Nirvana was recorded in 1991 at Del Mar Fairgrounds, California. It was released later as a promotional single in 1996 on the live album From the Muddy Banks of the Wishkah.