Multiple Chemical Sensitivity (MCS) is a chronic condition that is sometimes referred to as environmental illness, total allergy syndrome, sick building syndrome, chemical intolerance, or idiopathic environmental intolerance. People with MCS report symptoms such as migraine headaches, asthma, dizziness, difficulty breathing, skin problems, red or watery eyes, swollen lymph nodes, nausea, fast or irregular heartbeat, and muscle or joint pain. These symptoms are reported to occur following exposure to concentrations of chemicals that are below the levels that are typically considered harmful for the general population. However, there is disagreement among health practitioners regarding whether MCS is a medical disorder with established cause and effect relationships between symptoms and low-level chemical exposures. Some healthcare providers question whether it exists and whether the underlying illness is not medical but rather psychiatric, and that the symptoms are caused by anxiety. Others acknowledge it as a medical disorder triggered by exposures to chemicals, electromagnetic forces, or other environmental triggers. The American Medical Association doesn’t consider multiple chemical sensitivity to be an illness. People with MCS may experience difficulties with regular attendance and completing work assignments, and some accommodations for students with MCS include flexible attendance due to frequent illness, or alternatives to assignments that involve irritating chemicals or materials.