Like for patients having fibromyalgia, MCS patients have altered Cerebral blood flow.
“A lower baseline flow of blood to the brain is common. When these patients are exposed to perfumes and petrochemicals, they develop further decreases in blood flow to the brain.
MCS is an acquired and progressive neurological disease induced by exposure to chemical and fragrance products.
MCS is often misinterpreted as or compared to asthma and allergies, which generally cause only temporary inconvenience and can be treated and reversed with antihistamines. In most cases, neither asthma nor allergies impacts the ability to live a relatively normal life.
However, people with MCS suffer progressive and cumulative harm, cognitive impairment, brain changes, and end organ damage with exposure to even small amounts of the seemingly innocuous chemical and fragrance substances in the air.
Those with chronic symptoms show long-term reduced blood flow to the brain and reduced ability of the brain to take up a tracer substance. This indicates a neurotoxic metabolic abnormality consistent with toxic environmental exposures to pesticides and other chemicals.”