Heart Ache is the first release by Jesu. Justin K. Broadrick wrote both tracks, played all of the instruments as well as mixed and produced the EP. It was originally released August 30, 2004 by Dry Run Records; Avalanche Recordings released a 12" vinyl version in January 2008 also. The vinyl version is limited to 1500 copies.
The title is often misspelled as Heartache (one word). The separation of the two words may possibly be indicative of a further emphasis on an expression of physical/emotional pain (such as "flesh wound") more than a romantic reference to the feeling of heartache, although it may well be an allusion to the latter as well.