Post-Nasal Drip (Mucus, Phlegm, Pus Draining Back of Throat)
The mucosal epithelium lining the nasal passages ensures that a constant supply of mucus maintains the health of upper respiratory tract. The movement of air has a drying effect so the mucus keeps the area moistened. Dust and airborne microbes are trapped in the mucus and not allowed to travel deeper into the respiratory >> Read More ...