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Anosmia
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'''Anosmia''' is the loss of sense of smell, [[hyposmia]] is a reduced sense of smell, [[parosmia]] is an altered sense of smell, and [[phantosmia]] is when you smell things that aren't there.<ref name="JHopkinsSmell-taste"">{{Cite web | url = https://www.hopkinsmedicine.org/health/conditions-and-diseases/smell-and-taste-disorders | title = Smell and Taste Disorders | last = | first = | author-link = | date = | website = Johns Hopkins Medicine|language=en|archive-url=|archive-date=|url-status= | access-date = 2021-12-12}}</ref><ref name="nidcd">{{Cite web | url = https://www.nidcd.nih.gov/health/smell-disorders | title = Smell Disorders | website = NIDCD|language=en | access-date = 2021-12-12}}</ref> A change in sense of smell may occur alongside a change in [[changes in taste|sense of taste]]. ==ME/CFS== ==Prevalence in ME/CFS== *2001, In a very largeBelgian study, 38.0% of patients meeting the [[Fukuda criteria]] for [[chronic fatigue syndrome]] and 42.4% of patients meeting the [[Holmes criteria]], in a cohort of 2073 [[Chronic fatigue syndrome|CFS]] patients, reported changes in taste, hearing or smell.<ref>{{Cite journal | last = De Becker | first = Pascale | author-link = Pascale De Becker | last2 = McGregor | first2 = Neil | author-link2 = Neil McGregor | last3 = De Meirleir | first3 = Kenny | author-link3 = Kenny De Meirleir | date = December 2001 | title = A definition‐based analysis of symptoms in a large cohort of patients with chronic fatigue syndrome | url =https://onlinelibrary.wiley.com/doi/full/10.1046/j.1365-2796.2001.00890.x?sid=nlm%3Apubmed | journal = Journal of Internal Medicine | volume = 250 | issue = 3 | pages = 234–240|doi=10.1046/j.1365-2796.2001.00890.x|quote=|via=}}</ref> ==Causes== Common causes include *obesity *[[diabetes]], *[[hypertension]] (high blood pressure) *[[Malnutrition|poor nutrition]] *nervous system diseases, e.g., [[Parkinson's disease]], [[Alzheimer's disease]], or [[multiple sclerosis]] *colds, [[influenza|flu]] or flu-like illnesses, sinus problems and [[allergies]] *an [[Parosmia|altered or loss of smell]] and taste may also be caused by [[COVID-19]] illness or long COVID<ref name="JHopkinsSmell-taste"" /> ==Learn more== *[https://www.hopkinsmedicine.org/health/conditions-and-diseases/smell-and-taste-disorders Smell and taste disorders] - Johns Hopkins University ==See also== *[[Changes in taste]] *[[Long COVID]] *[[COVID-19]] (Coronavirus disease 19) ==References== {{Reflist}} [[Category:Neurological signs and symptoms]] [[Category:Long COVID signs and symptoms]]
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