Editing Multiple chemical sensitivity (section)

{{Short description|Controversial medical diagnosis}}
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<!--Definition and symptoms-->
'''Multiple chemical sensitivity''' ('''MCS''') is an unrecognized and controversial diagnosis characterized by chronic [[symptoms]] attributed to exposure to low levels of commonly used chemicals.<ref name="Genuis2013">{{Cite journal|last1=Genuis|first1=SJ|date=May 2013|title=Chemical sensitivity: pathophysiology or pathopsychology?|journal=Clinical Therapeutics|volume=35|issue=5|pages=572–7|doi=10.1016/j.clinthera.2013.04.003|pmid=23642291}}</ref><ref name="Templeton">{{Citation |last1=Templeton |first1=Douglas M. |last2=Schwenk |first2=Michael |last3= Duffus |first3=John H. |date=2016 |title=Multiple Chemical Sensitivity (MCS) |work=[[International Union of Pure and Applied Chemistry|IUPAC]] Glossary of Terms Used in Neurotoxicology |publisher=[[De Gruyter]] |url=https://www.researchgate.net/publication/286049129 |doi=10.1515/pac-2015-0103 |quote=multiple chemical sensitivity (MCS) -environmental illness -idiopathic environmental intolerance -Intolerance condition attributed to extreme sensitivity of individuals to various environmental chemicals, found in air, food, water, building materials, or fabrics. Note 1:  This syndrome is characterized by the patient's belief that his or her symptoms are caused by very low-level exposure to environmental chemicals. The term "chemical" is used to refer broadly to many natural and man-made substances, some of which have several chemical constituents. Note 2: ... }}</ref> Symptoms are typically [[vagueness|vague]] and [[non-specific symptoms|non-specific]]. They may include [[fatigue (medical)|fatigue]], [[headache]]s, [[nausea]], and [[dizziness]]. 

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Recent imaging studies have shown that it is likely a [[Neurology|neurological]] condition.<ref>{{Cite journal |last1=Molot |first1=John |last2=Sears |first2=Margaret |last3=Anisman |first3=Hymie |date=2023-08-01 |title=Multiple chemical sensitivity: It's time to catch up to the science |journal=Neuroscience & Biobehavioral Reviews |volume=151 |page=105227 |doi=10.1016/j.neubiorev.2023.105227 |pmid=37172924 |issn=0149-7634|doi-access=free }}</ref>

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MCS is a [[chronic disease]] that requires ongoing management.  In the long term, about half of people with MCS get better and about half continue to be affected, sometimes severely.<ref name="Current 2021" />
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