Multiple chemical sensitivity can include a wide range of symptoms, which some people link to their environment. It’s also known as “environmental illness,” “sick building syndrome,” or “MCS.” Your doctor may call it “idiopathic environmental intolerance.”

The symptoms people report is wide-ranging. They include a 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.

Multiple Chemical Sensitivity; in broad terms, it means an unusually severe sensitivity or allergy-like reaction to many different kinds of pollutants including solvents, VOC’s (Volatile Organic Compounds), perfumes, petrol, diesel, smoke, and “chemicals.”

The problem is ongoing, ie. chronic, and not a “one-off” event. The same symptoms are reproducible with repeated exposure to the same triggers. The patient is affected by many different triggers. The patient improves when triggers are absent. … More MCS Multiple Chemical Sensitivity