I'm no expert but this seems like a useful relatively short article on the topic of Multiple Chemical Sensitivity

https://mecfssa.org.au/resources/multiple-chemical-sensitivity-mcs

#MultipleChemicalSensitivity #MCS #TILT #SBS #EI #MultipleChemicalSensitivities #idiopathicenvironmentalintolerance #environmentalsensitivities #toxicinducedlossoftolerance #TILT