Air conditioning sickness is not a serious or dangerous condition for most people. In most cases, you will start to feel better if you get fresh air. This condition, which can cause feelings of being “stuffed up” as well as a feeling of weakness or cold, is usually caused by mold, mildew, fungi, or bacteria.
Sick building syndrome has been linked to poor indoor air quality. It can be caused by HVAC systems that blow around allergens or by inadequate ventilation. Symptoms can include headaches, itchy eyes, sneezing or wheezing, sore throat, gastrointestinal issues, and other problems.