Reflux-related mucus often persists despite normal nasal passages.
3. Chronic Sinusitis
When sinus cavities remain inflamed for more than 12 weeks, the condition is classified as chronic sinusitis.
Inflammation causes:
Thickened mucus
Impaired drainage
Continuous postnasal drip
Unlike a simple cold, symptoms persist long-term.
4. Allergies (Allergic Rhinitis)
Allergens stimulate immune response. Histamine release increases mucus production as a defense mechanism.
Common allergens:
Pollen
Dust mites
Pet dander
Mold
Allergy-related mucus is often clear and accompanied by:
Sneezing
Itchy eyes
