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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 nails can lead to broken skin on the cuticle. When cuticles are improperly removed, they are susceptible to microbial and viral infections such as paronychia. Saliva may then redden and infect the skin. In rare cases, fingernails may become severely deformed after years of nail biting due to the destruction of the nail bed.
Some people will engage in self-cannibalism as an extreme form of body modification, for example by ingesting parts of their own skin. In very rare cases, people have eaten a part of their own body (such as a foot) that had to be amputated for medical reasons; such acts may be motivated by curiosity or a desire to attract attention.
How do you stop biting your nails? An approach called habit replacement could help nail biters quit. It could also help with skin picking and trichotillomania.
When you bite your nails, you're transferring potentially dangerous bacteria into your vital organs, putting yourself at risk for abdominal pain and/or infection. The problem doesn't stop at...
Onychophagia, or nail biting, is a pretty common habit, affecting an estimated 20 to 30 percent of the population.
People with trichotillomania often also have trichophagia, with estimates ranging from 48-58% having an oral habit such as biting or chewing (i.e. trichophagy), and 4-20% actually swallowing and ingesting their hair (true trichophagia).
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Psychomotor agitation is typically found in various mental disorders, especially in psychotic and mood disorders. It can be a result of drug intoxication or withdrawal. It can also be caused by severe hyponatremia. The middle-aged and the elderly are more at risk to express it.
Autophagia refers to the practice of biting/consuming one's body. It is a sub category of self-injurious behavior (SIB). [1] Commonly, it manifests in humans as nail biting and hair pulling.