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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.
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.
Triggers are commonly repetitive stimuli and are primarily, but not exclusively, related to the human body, such as chewing, eating, smacking lips, slurping, coughing, throat clearing, sniffing, and swallowing.
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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.
Lesch–Nyhan syndrome (LNS) is a rare inherited disorder caused by a deficiency of the enzyme hypoxanthine-guanine phosphoribosyltransferase (HGPRT). This deficiency occurs due to mutations in the HPRT1 gene located on the X chromosome. LNS affects about 1 in 380,000 live births.
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. In extreme cases the entire tail is consumed. [11] Unlike humans, the causes for autophagia in rats has not yet been determined.
Tardive dyskinesia (TD) is a disorder that results in involuntary repetitive body movements, which may include grimacing, sticking out the tongue or smacking the lips. Additionally, there may be chorea or slow writhing movements. In about 20% of people with TD, the disorder interferes with daily functioning.
Body-focused repetitive behavior disorders ( BFRBDs) in ICD-11 is in development. [3] BFRB disorders are currently estimated to be under the obsessive-compulsive spectrum. [4] They are also associated with ADHD and anxiety .
The most common causes of Russell’s Sign are bulimia and anorexia nervosa. Diagnostic method. Russell's Sign can be used as a factor to diagnose bulimia nervosa or anorexia nervosa. Differential diagnosis. indirect sign of bulimia nervosa or anorexia nervosa. Deaths.