While it’s old news, those kids with nasal congestion may be predisposed to a very serious problem. Cystic Fibrosis. What is cystic fibrosis? According to the National Heart, Lung, and Blood Institute: “Cystic fibrosis (SIS-tik fi-BRO-sis), or CF, is an inherited disease of the secretion glands. Secretory glands include glands that make mucus and sweat.” […]