The document discusses sick building syndrome, which refers to situations where occupants of a building experience acute health and comfort effects that seem to be linked directly to time spent in a building, but no specific illness or cause can be identified. It outlines some of the common symptoms of sick building syndrome like respiratory issues, dry skin, headaches, and fatigue. It notes that symptoms typically occur soon after occupants enter a building and improve after leaving. Overall, the document provides a brief overview of sick building syndrome, its typical symptoms, and the fact that it seems to be linked to time spent in a particular building.