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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.
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]
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 ...
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.
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 ...
Handy eyes a burned-out lightbulb on the top of a ladder. He reaches for it, but due to the fact that he has no hands, he cannot do it. He decides to use his teeth to unscrew the lightbulb, but the ladder falls, shattering the many lightbulbs on Handy's toolbox. Handy's teeth end up shattering the lightbulb, causing glass shards to cut his mouth.
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 ...
The pathophysiology of a spider bite is due to the effect of its venom. A spider envenomation occurs whenever a spider injects venom into the skin. Not all spider bites inject venom – a dry bite, and the amount of venom injected can vary based on the type of spider and the circumstances of the encounter. The mechanical injury from a spider ...