Oxygen toxicity occurs when the body is exposed to high levels of oxygen for extended periods. This condition can affect the lungs and central nervous system, leading to symptoms such as coughing, chest pain, and in severe cases, seizures. It is most commonly associated with deep-sea diving or medical treatments that involve high concentrations of oxygen. The risk of oxygen toxicity increases with pressure, particularly in environments like underwater diving. In these situations, divers may use nitrox or other gas mixtures to reduce the risk. Understanding the limits of oxygen exposure is crucial for safety in both recreational and medical settings.