Cold & Flu
Runny Nose: Allergies, Colds & Other Causes
A constant runny nose may be linked to colds or flu, allergies, sinusitis, rhinitis, nasal polyps, pregnancy, reflux, or overused decongestant sprays. It may come with sneezing, watery eyes, cough, or low-grade fever; lasting over a week warrants an ENT visit.