Sinus infections can cause lung infections because the sinus drains down past the lungs. For me, it’s even more dangerous. I have Dysphagia, which is the failure of a soft piece of cartilage called an epiglottis which is attached to the larynx, to totally close over the trachea when swallowing. It is why I have to nebulize more regularly, but even more with any form of sinus problem. Thank you.