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Psychiatry. Types. OCD. Dermatophagia (from Ancient Greek δέρμα — lit.skin and φαγείαlit.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.
Darier's disease (DD) is a rare, genetic skin disorder. It is an autosomal dominant disorder, that is, if one parent has DD, there is a 50% chance than a child will inherit DD. It was first reported by French dermatologist Ferdinand-Jean Darier in 1889. Mild forms of the disease are the most common, consisting of skin rashes that flare up under ...
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 ...
Olfactory reference syndrome. Olfactory reference syndrome ( ORS) is a psychiatric condition in which there is a persistent false belief and preoccupation with the idea of emitting abnormal body odors which the patient thinks are foul and offensive to other individuals. [1] [2] People with this condition often misinterpret others' behaviors, e ...
Trimethylaminuria ( TMAU ), also known as fish odor syndrome or fish malodor syndrome, [1] is a rare metabolic disorder that causes a defect in the normal production of an enzyme named flavin-containing monooxygenase 3 (FMO3). [2] [3] When FMO3 is not working correctly or if not enough enzyme is produced, the body loses the ability to properly ...
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 ...
Stereotypic movement disorder ( SMD) is a motor disorder with onset in childhood involving restrictive and/or repetitive, nonfunctional motor behavior (e.g., hand waving or head banging), that markedly interferes with normal activities or results in bodily injury. [1] To be classified as SMD, the behavior in question must not be due to the ...
In addition to the bite itself, you might develop some other symptoms in the next few hours and days. The early signs of a spider bite may include: A raised, itchy bump or rash. Pain at the site ...