Dysgeusia or parageusia is an altered sense of taste, which may involve a persistent unpleasant taste, ageusia is a total loss of sense of taste, and hypogeusia is a reduced ability to taste sweet, sour, bitter, salty or umami (delicious/savoury) tastes.
Prevalence in ME/CFS[edit | edit source]
- 2001, In a Belgian 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 CFS patients, reported changes in taste, hearing or smell.
Symptom recognition[edit | edit source]
Notable studies[edit | edit source]
Possible causes[edit | edit source]
Common causes of altered sense of taste and/or smell include:
- nervous system diseases, e.g., Parkinson's disease, Alzheimer's disease, or multiple sclerosis
- colds, flu or flu-like illnesses, sinus problems and allergies
- head injury
- some drugs, e.g. zopiclone
- some scientists have found altered or loss of smell and taste linked to COVID-19 illness in some patients
Learn more[edit | edit source]
- Smell and taste disorders - Johns Hopkins University
See also[edit | edit source]
References[edit | edit source]
- "Smell and Taste Disorders". Johns Hopkins Medicine. Retrieved December 14, 2021.
- Doty, R. L. (January 1, 2014). Aminoff, Michael J.; Daroff, Robert B. (eds.). Ageusia. Oxford: Academic Press. pp. 69–71. ISBN 978-0-12-385158-1.
- Hellier, Jennifer L. (November 7, 2016). The Five Senses and Beyond: The Encyclopedia of Perception: The Encyclopedia of Perception. ABC-CLIO. ISBN 978-1-4408-3417-2.
- De Becker, Pascale; McGregor, Neil; De Meirleir, Kenny (December 2001). "A definition‐based analysis of symptoms in a large cohort of patients with chronic fatigue syndrome". Journal of Internal Medicine. 250 (3): 234–240. doi:10.1046/j.1365-2796.2001.00890.x.
- Soriano, Joan B.; Allan, Maya; Alsokhn, Carine; Alwan, Nisreen A.; Askie, Lisa; Davis, Hannah E.; Diaz, Janet V.; Dua, Tarun; de Groote, Wouter; Jakob, Robert; Lado, Marta; Marshall, John; Murthy, Srin; Preller, Jacobus; Relan, Pryanka; Schiess, Nicoline; Seahwag, Archana (October 6, 2021), A clinical case definition of post COVID-19 condition by a Delphi consensus, World Health Organization (WHO) clinical case definition working group on post COVID-19 condition, World Health Organization
- Mehraeen, Esmaeil; Behnezhad, Farzane; Salehi, Mohammad Amin; Noori, Tayebeh; Harandi, Hamid; SeyedAlinaghi, SeyedAhmad (June 17, 2020). "Olfactory and gustatory dysfunctions due to the coronavirus disease (COVID-19): a review of current evidence". European Archives of Oto-Rhino-Laryngology: 1–6. doi:10.1007/s00405-020-06120-6. ISSN 0937-4477. PMC 7297932. PMID 32556781.
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