Body horror or biological horror is a subgenre of horror that intentionally showcases grotesque or psychologically disturbing violations of the human body. These violations may manifest through aberrant sex, mutations, mutilation, zombification, gratuitous violence, disease, or unnatural movements of the body. Body horror was a description originally applied to an emerging subgenre of North American horror films, but has roots in early Gothic literature and has expanded to include other media. body horror falls into one of three "gross" genres or "genres of excess" which also includes pornography and melodrama.Body horror specifically focuses on the limits and transformative capabilities of the human body. Body horror often overlaps with, but is distinct from, other horror subgenres. For example, while elements of mutilation may be present in body horror, other similar subgenres such as slasher, splatter, or monster horror may also share this trope, but differ in message and intent. A common difference in the body horror genre is that violations or distortions of the body are rarely the result of immediate or initial violence. Instead, they are generally marked by a loss of conscious control over the body through mutation, disease, or other tropes involving uncontrolled transformation. The genre can invoke intense feelings of physical and psychological disgust, or squick, and play upon anxieties of physical vulnerability. In addition to common tropes used within the broader horror genre, some tropes specific to the body horror subgenre may include invasion, contagion, mutation, transformation, disease, mutilation, or other unnatural or violent distortions of the human body.