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Dermatophagia (from Ancient Greek δέρμα — lit. skin and φαγεία lit. eating) or dermatodaxia (from δήξις, lit. biting) is a compulsion disorder of gnawing or biting one's own skin, most commonly at the fingers.
Biting the fingers and lips is a definitive feature of Lesch–Nyhan syndrome; in other syndromes associated with self-injury, the behaviors usually consist of head banging and nonspecific self-mutilation, but not biting of the cheeks, lips and fingers.
The resulting behavior consists of the rats licking and then chewing their nails, and the tips of their toes. In extreme cases, the rats will chew off whole toes or even the foot. In animals, autophagia tends to be restricted to the hind limbs and the lower parts of the abdomen. Symptoms include chewing of limbs, paws and tails.
Nail biting, also known as onychophagy or onychophagia, is an oral compulsive habit of biting one's fingernails. It is sometimes described as a parafunctional activity, the common use of the mouth for an activity other than speaking, eating, or drinking.
So, if you're addicted to chewing on your nails, you might want to reconsider the habit -- stop putting yourself at risk! In case that wasn't enough reason for you to stop, check out the video...
Excoriation disorder, more commonly known as dermatillomania, is a mental disorder on the obsessive–compulsive spectrum that is characterized by the repeated urge or impulse to pick at one's own skin, to the extent that either psychological or physical damage is caused.
The Minnesota Starvation Experiment, also known as the Minnesota Semi-Starvation Experiment, the Minnesota Starvation-Recovery Experiment and the Starvation Study, was a clinical study performed at the University of Minnesota between November 19, 1944, and December 20, 1945. The investigation was designed to determine the physiological effects ...
Body-focused repetitive behavior disorders (BFRBDs) in ICD-11 is in development. BFRB disorders are currently estimated to be under the obsessive-compulsive spectrum. They are also associated with ADHD and anxiety.
Russell's sign, named after British psychiatrist Gerald Russell, is a sign [1] defined as calluses on the knuckles [2] or back of the hand due to repeated self-induced vomiting over long periods of time.
In more severe cases, the motions may become harmful to the individual, and may involve things such as ripping, tearing, or chewing at the skin around one's fingernails, lips, or other body parts to the point of bleeding. Psychomotor agitation is typically found in various mental disorders, especially in psychotic and mood disorders.