What type of environmental factor can exacerbate asthma symptoms?

Air pollution is an important environmental factor that can exacerbate asthma symptoms. It consists of various harmful substances in the air, including particulate matter, ozone, nitrogen dioxide, and sulfur dioxide. These pollutants can irritate the airways, leading to increased inflammation and bronchoconstriction in individuals with asthma. Such irritation can result in symptoms like wheezing, coughing, shortness of breath, and chest tightness.

In particular, when air pollution levels are high, individuals with asthma may experience a worsening of their condition, leading to more frequent and severe asthma attacks. Therefore, it is crucial for individuals with asthma to be aware of air quality indices and take necessary precautions when pollution levels are elevated.

Other factors, while they can influence comfort, do not have the same level of documented impact on asthma exacerbation as air pollution. For instance, low humidity could lead to dry air that may cause discomfort, but it is not a primary trigger for asthma. High altitude might affect breathing due to lower oxygen levels, but it isn't directly correlated with asthma exacerbations in the same way as air pollution. Sun exposure can lead to other health issues but does not significantly impact asthma symptoms in the same manner.