Diagnosing carbon monoxide poisoning is very difficult. It's not just homeowners who may find it difficult to diagnose. Carbon monoxide poisoning is also very challenging for health professionals to diagnose.
A research project carried out by St George’s, Epsom and St Helier University Hospitals, University of Surrey and Frimley Health Foundation Trust has sought to reduce misdiagnosis so that patients can be treated appropriately and not sent back to the site of exposure before it is safe to do so.
Read more about this study here.
To understand why it's so difficult to diagnose, it's useful to understand what happens when you are exposed to carbon monoxide.