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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.
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.
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.
Fingernail-biting that develops into fingernail-eating is a form of pica. Other forms of pica include dermatophagia, and compulsion of eating one's own hair, which can form a hairball in the stomach. Left untreated, this can cause death due to excessive hair buildup.
Onychophagia, or nail biting, is a pretty common habit, affecting an estimated 20 to 30 percent of the population.
Pica is the eating or craving of things that are not food. It is classified as an eating disorder but can also be the result of an existing mental disorder. The ingested or craved substance may be biological, natural or manmade.
The region most commonly picked is the face, but other frequent locations include the arms, legs, back, gums, neck, shoulders, scalp, abdomen, chest, and extremities such as the fingernails, cuticles, toenails, etc.
A nail is a protective plate characteristically found at the tip of the digits ( fingers and toes) of all primates, corresponding to the claws in other tetrapod animals. Fingernails and toenails are made of a tough rigid protein called alpha-keratin, a polymer also found in the claws, hooves and horns of vertebrates.
Carotenosis is a benign and reversible medical condition where an excess of dietary carotenoids results in orange discoloration of the outermost skin layer. The discoloration is most easily observed in light-skinned people and may be mistaken for jaundice.
Discoloration of entire nail bed. Yellowing of the nail bed is associated with chronic bronchitis, lymphatic problems, diabetes, and liver disorders. Brown or copper nail beds are associated with arsenic or copper poisoning, and local fungal infection. Redness is associated with heart conditions.
