Indoor air pollution poses many challenges to the health professional. This booklet offers an overview of those challenges, focusing on acute conditions, with patterns that point to particular agents and suggestions for appropriate remedial action. It should be used as a tool in diagnosing an individual's signs and symptoms that could be related to an indoor air pollution problem. Organised according to pollutant or pollutant group. Key signs and symptoms from exposure to the pollutant(s) are listed, with diagnostic leads to help determine the cause of the health problem. A quick reference summary of this information is included. Remedial action is suggested, with comment providing more detailed information in each section.