Nasal discharge is very common but rarely serious. Swollen or infected sinuses may produce thick or discoloured discharge in the form of mucus, whether caused by the flu virus or allergies. Nasal polyps may also cause persistent nasal discharge.
Should I seek medical attention?
Most cases of nasal discharge are mild but if the discharge is foul smelling, one-sided, or a colour other than white or yellow, you may wish to consult a doctor. Also, if the nasal discharge follows a head injury or when the symptoms last more than three weeks, you should bring this to the attention of a medical practitioner.
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