What is one common symptom of sick-building syndrome?

Frequent headaches are a common symptom of sick-building syndrome, which refers to a condition where occupants of a building experience various health issues and discomforts that appear to be linked to time spent in that building, but no specific illness or cause can be identified. This phenomenon is often associated with poor indoor air quality, inadequate ventilation, or the presence of pollutants such as volatile organic compounds (VOCs), which can lead to symptoms such as headaches, fatigue, and irritation of the eyes, nose, or throat. The presence of frequent headaches among occupants indicates that their environments might be contributing to their health concerns, prompting a need for assessment and potential remediation of the indoor environment.

In contrast, the other options like excessive energy, improved focus, and pleasant odors do not align with the typical symptoms associated with sick-building syndrome, as these suggest positive experiences that would not normally occur in environments causing health issues related to this syndrome.