The sinuses are small air pockets in the skull around the eyes, nose, and forehead that are lined with mucous membranes. They moisten the air we breathe in while also catching dust, microbes, and allergens before these can reach the lungs.This warm, moist environment is the perfect breeding ground for bacteria, fungi, and mold, but the body does a good job of removing or destroying the captured bacteria, spores, and cysts before they can begin growing.Problems...