A particularly blocked nose should be treated differently depending on the cause. If the nasal congestion is considered to be caused by cold, flu or acute upper respiratory tract infection, it can be treated with pseudoephedrine, which can reduce nasal congestion. You can also use topical nasal drops, and you can also make the symptoms of nasal congestion relieved by smoking the nasal cavity with hot water vapor. If allergic rhinitis is considered to be the cause of nasal congestion and non-ventilation, oral anti-allergy drugs can be taken to relieve nasal ventilation. There are also nasal polyps or malignant tumors in the nasopharynx that cause nasal non-ventilation, which should be treated by surgical removal.