What Causes Chronic Post Nasal Drip and Constant Throat Clearing?
1. Introduction Chronic post nasal drip and constant throat clearing are primarily caused by allergic rhinitis, chronic sinusitis, or laryngopharyngeal reflux. These conditions create continuous mucosal irritation and excess mucus production that drips down the back of the pharynx. The body responds with a reflexive clearing mechanism to protect the airway and vocal cords from … Read more