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  2. Dermatophagia - Wikipedia

    en.wikipedia.org/wiki/Dermatophagia

    Those with dermatophagia typically chew the skin surrounding their fingernails and joints. They also chew on the bottom of their feet/toes, inside of their mouth, cheeks, and/or lips, causing blisters in and outside of the mouth. If the behavior is left unchecked for an extended period, calluses may start to develop where most of the biting is ...

  3. Nail biting - Wikipedia

    en.wikipedia.org/wiki/Nail_biting

    Nail biting, also known as onychophagy or onychophagia, is an oral compulsive and unhygienic 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.

  4. Autophagia - Wikipedia

    en.wikipedia.org/wiki/Autophagia

    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. [10] In animals, autophagia tends to be restricted to the hind limbs and the lower parts of the abdomen. [3] Symptoms include chewing of limbs, paws and tails.

  5. Onychotillomania - Wikipedia

    en.wikipedia.org/wiki/Onychotillomania

    Onychotillomania is a compulsive behavior in which a person picks constantly at the nails or tries to tear them off. [1] It is not the same as onychophagia, where the nails are bitten or chewed, or dermatillomania, where skin is bitten or scratched.

  6. Excoriation disorder - Wikipedia

    en.wikipedia.org/wiki/Excoriation_disorder

    There have been many different theories regarding the causes of excoriation disorder, including biological and environmental factors. [10]A common hypothesis is that excoriation disorder is often a coping mechanism to deal with elevated levels of turmoil, boredom, anxiety, or stress within the individual, and that the individual has an impaired stress response.

  7. Nail disease - Wikipedia

    en.wikipedia.org/wiki/Nail_disease

    A new nail plate will form once the cause of the disease is removed. Onychomycosis , also known as tinea unguium , is a contagious infection of the nail caused by the same fungal organisms which cause ringworm of the skin ( Trichophyton rubrum or T. mentagrophytes , rarely other trichophyton species or Epidermophyton floccosum [ 1 ] ).

  8. Hand fetishism - Wikipedia

    en.wikipedia.org/wiki/Hand_fetishism

    Female hands. Hand fetishism, [1] hand partialism or cheirophilia is the sexual fetish for hands. This may include the sexual attraction to a specific area such as the fingers, palm, back of the hand and/or nails, or the attraction to a specific action performed by the hands; which may otherwise be considered non-sexual—such as washing and drying dishes, painting of the fingernails and nail ...

  9. Pica (disorder) - Wikipedia

    en.wikipedia.org/wiki/Pica_(disorder)

    Pica is the eating of, or craving to eat, things that are not food. [2] It is classified as an eating disorder but can also be the result of an existing mental disorder. [3] ...