Verywell Health's content is for informational and educational purposes only. Our website is not intended to be a substitute for professional medical advice, diagnosis, or treatment. As anyone with stuffy sinuses can attest, congestion often feels worse at night. One key reason: When you lie flat, gravity causes mucus to pool https://www.linkedin.com/feed/update/urn:li:share:7356320248985194496/?actorCompanyId=77283885