PATHOLOGY

Detailed explanation-1: -A runny nose is often called rhinorrhea or rhinitis. But the terms are different. Rhinorrhea involves a thin, mostly clear fluid running from the nose. Rhinitis involves irritation and swelling inside the nose.

Detailed explanation-2: -Mucopurulent rhinorrhea (i.e., purulent nasal discharge) denotes nasal discharge that is thick, opaque, and colored. 1 It occurs at any age and usually is a manifestation of a self-limited and uncomplicated viral upper respiratory tract infection (URI).