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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.
Dermatillomania (picking of the skin) of the knuckles (via mouth), illustrating disfiguration of the distal and proximal joints of the middle and little fingers Body-focused repetitive behavior ( BFRB ) is an umbrella name for impulse control [1] behaviors involving compulsively damaging one's physical appearance or causing physical injury.
Nail biting; Pulling hair; Chewing fingers (in extreme cases, leading to amputation) Possible causes. This section will focus on the causes for autophagia in humans. There is no single primary cause for autophagia.
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]
The self-injury begins with biting of the lips and tongue; as the disease progresses, affected individuals frequently develop finger biting and headbanging. The self-injury can increase during times of stress. Self-harm is a distinguishing characteristic of the disease and is apparent in 85% of affected males.
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 at ...
Fingers of a nail-biter. 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.
Varying degrees of automatism may include simple gestures, such as finger rubbing, lip smacking, chewing, or swallowing, or more complex actions, such as sleepwalking behaviors. [4] [5] Others may include speech, which may or may not be coherent or sensible. [6]
Tardive dyskinesia is characterized by repetitive, involuntary movements. Some examples of these types of involuntary movements include: Grimacing; Tongue movements; Lip smacking; Lip puckering; Pursing of the lips; Excessive eye blinking; Rapid, involuntary movements of the limbs, torso, and fingers may also occur.
Thumb sucking is a behavior found in humans, chimpanzees, captive ring-tailed lemurs, [1] and other primates. [2] It usually involves placing the thumb into the mouth and rhythmically repeating sucking contact for a prolonged duration. It can also be accomplished with any organ within reach (such as other fingers and toes) and is considered to ...