Why do some bedrooms give a stuffy nose?

Some bedrooms may contribute to a stuffy nose due to poor air quality, allergens, or humidity levels. Dust mites, pet dander, mold, and pollen can accumulate in bedding and carpets, triggering allergic reactions. Additionally, inadequate ventilation can lead to stale air, while high humidity can encourage mold growth. Keeping the bedroom clean, well-ventilated, and maintaining optimal humidity can help alleviate these issues.