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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.
Lesch–Nyhan syndrome. 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. [3]
Alien hand syndrome ( AHS) or Dr. Strangelove syndrome [1] is a category of conditions in which a person experiences their limbs acting seemingly on their own, without conscious control over the actions. [2] There are a variety of clinical conditions that fall under this category, which most commonly affects the left hand. [3]
Delusional parasitosis. Delusional parasitosis (DP) is a mental disorder in which individuals have a persistent belief that they are infested with living or nonliving pathogens such as parasites, insects, or bugs, when no such infestation is present. They usually report tactile hallucinations known as formication, a sensation resembling insects ...
5. Pain or discomfort. If a dog is in pain or discomfort, due to an injury or an underlying health issue, they may react aggressively during play if certain movements exacerbate this discomfort ...
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. Nail biting is very common, especially amongst children. 25–35 percent of children bite ...
The first theory suggests feline hyperesthesia syndrome is a behavioural disorder, which is caused by either behavioural displacement or stress factors. Stress increases the release of [alpha]-melanocyte-stimulating hormone and causes increased grooming and endorphin production.
Tinea manuum is a fungal infection of the hand, mostly a type of dermatophytosis, often part of two feet-one hand syndrome. [2] [4] There is diffuse scaling on the palms or back of usually one hand and the palmer creases appear more prominent. [2] When both hands are affected, the rash looks different on each hand, with palmer creases appearing ...