Multiple Chemical Sensitivity (MCS) is a condition where individuals experience adverse reactions to low levels of various chemicals found in everyday products. These can include items like perfumes, cleaning agents, and pesticides. Symptoms may range from headaches and fatigue to respiratory issues and skin irritations, making it challenging for affected individuals to navigate environments with common chemical exposures. The exact cause of MCS is not well understood, and it is a topic of ongoing research. Some experts believe it may be linked to previous chemical exposures or environmental factors. Treatment often focuses on avoiding triggers and managing symptoms rather than a definitive cure.