Multiple chemical sensitivity (MCS), also known as toxic-induced loss of tolerance (TILT) or DELTA, is a syndrome often initiated by low-level chemical exposures. People afflicted by MCS suffer from a range of different symptoms, and can often link the onset of their symptoms to a specific event or type of exposure. Here are the definitions for MCS from other online resources:
Multiple chemical sensitivity (MCS) is a chronic medical condition characterized by symptoms that the affected person attributes to low-level chemical exposure. Commonly attributed substances include scented products, pesticides, plastics, synthetic fabrics, smoke, petroleum products, and paint fumes.
Multiple chemical sensitivity (MCS) is also called “environmental illness” or “sick building syndrome.” It refers to a variety of non-specific symptoms reported by some people after possible exposure to chemical, biologic, or physical agents.
The symptoms people report are wide-ranging. They include headache, fatigue, dizziness, nausea, congestion, itching, sneezing, sore throat, chest pain, changes in heart rhythm, breathing problems, muscle pain or stiffness, skin rash, diarrhea, bloating, gas, confusion, trouble concentrating, memory problems, and mood changes.
People who have the symptoms may blame them on a major event, such as a chemical spill. Or some may link their symptoms to contact with low levels of chemicals at work, perhaps while working in an office with poor ventilation. Reported triggers include tobacco smoke, auto exhaust, perfume, insecticide, new carpet, chlorine, and countless others. Some say that levels of exposure generally considered safe for most people can have an effect on a few.