Regular nose blockage with continuous use of Otrivin Nasal Spray is commonly caused by rebound congestion, in which the nose becomes more blocked due to frequent spray use. These sprays usually give quick relief for a short time, but using them repeatedly for many days can make the swelling inside the nose return more strongly. Allergy, sinus inflammation, dust exposure, pollution or a deviated nasal septum may add to the long-term blockage. Saline nasal rinses, steam inhalation, hydration and avoiding smoke or dust may naturally help reduce irritation. Doctors often recommend gradually stopping the decongestant spray and using steroid nasal sprays or antihistamine medicines for safer long-term control of allergic swelling and mucus buildup. Do not suddenly increase the spray frequency for relief because this may worsen dependence. Consult your doctor for a proper nasal examination and guidance on safely reducing the spray while controlling congestion.