Dysgeusia 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 - John Hopkins University
See also[edit | edit source]
References[edit | edit source]
- 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.