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Formication
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{{stub}} '''Formication''' is the sensation of insects crawling on or within the skin, when there are no bugs found. Skin crawling sensations may also be part of [[paresthesia]], which is caused by disrupted nerve sensations in the body.<ref name=SkinDisorders2009>{{Cite book | title = The Encyclopedia of Skin and Skin Disorders | pages = 282|isbn=978-0-8160-7509-6|edition=3rd|volume=|language=en| title-link = | url = https://books.google.co.uk/books?id=GKVPHoIs8uIC&lpg=PA282&pg=PA282#v=onepage|access-date= | date = 2009| publisher = Infobase Publishing | last = Turkington | first = Carol | authorlink = | last2 = Dover | first2 = Jeffrey S. | authorlink2 = |quote=|archive-url=|archive-date=|location=|editor-last = |editor-first = | editor1-link = |editor-last2 = |editor-first2 = }}</ref>{{Rp|282}} ==Causes== ===Delusions=== Formication can occur with delusions of parasitosis, which is also known as parasitophobia. This is the false beliefs that bugs are crawling in or under the skin, and typically occurs in people with [[schizophrenia]] or [[obsessive-compulsive disorder]], who may go to extreme lengths to try to remove or kill the presumed bugs.<ref name=SkinDisorders2009 />{{Rp|102}} ===Nerves=== Crawling sensations affecting the skin may be caused by disrupted nerve signalling. ===Malnutrition=== Formication can be caused by beri-beri, a disease caused by inadequate levels of [[thiamin]], better known as vitamin B1.<ref name="HumanNutr2012">{{Cite book | title = Encyclopedia of Human Nutrition | pages = 268|isbn=978-0-12-384885-7|edition=3rd|volume=4|language=en| title-link = | url = https://books.google.co.uk/books?id=OqcL6JgTUf8C&lpg=PA268&pg=PA268#v=onepage&f=false|access-date= | date = 2012-12-28| publisher = Academic Press | last = Thurnham | first = David I. | author-link = |others=|doi=|oclc=|quote=|archive-url=|archive-date=|location=|editor-last = Caballero|editor-first = Benjamin| editor1-link = |editor-last2 = |editor-first2 = }}</ref> ==Learn more == ==See also == *[[Thiamin]] *[[B vitamins]] *[[Paresthesia]] ==References == {{Reflist}} [[Category:Signs and symptoms]] [[Category:Neurological signs and symptoms]] [[Category:Sensitivity signs and symptoms]]
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