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OCD. Dermatophagia (from Ancient Greek δέρμα — lit. skin and φαγεία lit. eating) or dermatodaxia (from δήξις, lit. biting) [ 3] is a compulsion disorder of gnawing or biting one's own skin, most commonly at the fingers. This action can either be conscious or unconscious [ 4] and it is considered to be a type of pica.
Delusional parasitosis (DP) or delusional infestation[ 2] is a mental disorder in which individuals have a persistent delusion that they are infested with living or nonliving agents, such as parasites, insects, or bacteria, when no such infestation is present. [ 3] Individuals may present with dermatologic symptoms, such as excoriation or ...
Autophagia. Not to be confused with Autophagy. Autophagia is 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. In rarer circumstances, it manifests as serious self mutilative behavior such as biting off one's fingers. [2]
Specialty. Dermatology. Psychiatry. 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. [ 4][ 5]
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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. The condition generally arises from the patient's knuckles making contact with the incisor teeth during the act of inducing the gag reflex ...
They do not actually "bite", but instead form a hole in the skin called a stylostome and chew up tiny parts of the inner skin, thus causing irritation and swelling. The itching is accompanied by red, pimple-like bumps or hives and skin rash or lesions on a sun-exposed area. For humans, itching usually occurs after the larvae detach from the skin.
Snakebite. A snakebite is an injury caused by the bite of a snake, especially a venomous snake. [ 9] A common sign of a bite from a venomous snake is the presence of two puncture wounds from the animal's fangs. [ 1] Sometimes venom injection from the bite may occur. [ 3] This may result in redness, swelling, and severe pain at the area, which ...