<prompt> MC cause of discharge from the nose isCSF rhinorrheaLupus erythematosusTraumaAllergic rhinitis  <response>: Causes Common causes The most common causes of nasal congestion and discharge are the following: Viral upper respiratory infections colds Allergic reactions Less common causes Less common causes include Sinus infection sinusitis Foreign object body in the nose Overuse of decongestant sprays Vasomotor rhinitis 