Overview

Self-cannibalism, also called autosarcophagy or autocannibalism, refers to the act of eating parts of one’s own body. The term covers a spectrum of behaviours from relatively common oral habits, such as nail-biting or chewing skin, to rare and severe acts involving ingestion of flesh or amputated tissue. For more technical background and terminology see related resources.

Forms and characteristics

Behaviours described as self-cannibalism vary by intent, severity and body part involved. Examples include:

  • Habitual oral behaviours: nail-biting (onychophagia), skin-biting (dermatophagia) and hair-eating (trichophagia).
  • Compulsive or pathological acts linked to psychiatric conditions, where individuals bite or consume flesh from wounds.
  • Extreme, rare incidents in which persons have ingested amputated tissue or otherwise consumed their own flesh.

Causes and contexts

Self-cannibalistic acts can arise in several contexts: as nervous habits, as symptoms of neuropsychiatric disorders (for example, severe obsessive-compulsive disorder, psychosis or certain developmental disorders), as part of pica-related behaviours, or associated with substance use and extreme self-harm. Cultural or ritual motivations are seldom reported and should be distinguished carefully from psychopathology. Intent and consciousness vary widely across cases.

Non-human occurrences

Similar behaviors occur across the animal kingdom but are often different in meaning: many invertebrates and reptiles consume shed skins or exuviae to reclaim nutrients, and some animals will eat injured tissue under particular conditions. These biological practices are typically adaptive and should be distinguished from the psychological phenomenon in humans.

Consuming one’s own tissue carries medical risks including infection, bleeding, scarring and nutritional or metabolic complications. Severe cases raise complex legal and ethical issues concerning capacity, self-harm prevention and care. Social stigma and isolation may compound psychological distress for affected individuals.

Treatment and prevention

Management depends on cause and severity. Mild habitual behaviours may respond to behavioural interventions, habit-reversal training and protective measures (barriers, bitter solutions). Clinical cases often require multidisciplinary care: psychiatric assessment, psychotherapy, medication where indicated, wound care and sometimes legal or social interventions to ensure safety. Early recognition and compassionate, evidence-based treatment reduce harm and improve outcomes.