There are many kinds of Body Horror. Some are done from a Painful Transformation, Gorn, Orifice Invasion, Chest Burster, or something else terrible happening to a person's body.
This is when a person's body is mutilated due to deliberate intent.
Such a character has been subjected to body modification (tattooing, piercing, cutting, etc.) to a degree that goes beyond "fashionable" and straight [...] [tvtropes.org]