What is a common symptom of carbon monoxide poisoning?

A common symptom of carbon monoxide poisoning includes fatigue, nausea, and chest pain. These symptoms arise because carbon monoxide interferes with the body’s ability to transport and utilize oxygen effectively. When inhaled, carbon monoxide binds with hemoglobin in the blood, forming carboxyhemoglobin, which reduces oxygen delivery to tissues.

Fatigue is often one of the initial symptoms, as the body's energy levels diminish due to insufficient oxygen. Nausea can occur as the body responds to the stress of lack of oxygen, and chest pain might arise from the increased strain on the heart, which is working harder to supply oxygen to the body under stressful conditions. Since all of these symptoms can manifest as a result of carbon monoxide exposure, the most comprehensive answer is "All of the above," as it covers the range of potential symptoms that an individual may experience.