What is a common symptom of exposure to poor indoor air quality?

Headaches, sinus congestion, and respiratory issues are well-documented symptoms associated with poor indoor air quality. When indoor environments are contaminated with pollutants such as mold, dust, pet dander, volatile organic compounds (VOCs), or carbon monoxide, the body can react adversely. These pollutants often irritate the respiratory tract and sinuses, leading to symptoms like headaches and congestion. In particular, respiratory issues can manifest in various forms, including difficulty breathing, asthma exacerbations, or a general feeling of discomfort. This connection between indoor air quality and these specific symptoms underscores the importance of monitoring and maintaining healthy indoor environments to prevent such health issues.

While fatigue, increased allergies, and dizziness can also be related to poor indoor air quality, they are not as directly tied to it as the symptoms mentioned in the correct answer.