When bilateral alternating nasal congestion occurs, it will more often be caused by the nasal disease itself, such as hypertrophic rhinitis, deviated nasal septum, sinusitis, nasal polyps, etc. It is necessary to first improve the nasal endoscopy to observe the whole nasal cavity from front to back, and if necessary, it can be combined with sinus CT for clear diagnosis. For the early lesions, it is more of a medication-based treatment. Glucocorticoid-based nasal sprays can be used, which have good local anti-inflammatory and anti-allergic effects, reduce mucosal swelling and promote further recovery of its function. If accompanied by a large amount of yellow pus nasal discharge, an antimicrobial agent of sensitive class should be used to control the infection, assisted by saline rinsing of nasal cavity, which can clear the inflammatory secretions, irritants and allergens in the nasal cavity and promote further recovery of its function. When conservative treatment with medication is ineffective, a personalized surgical plan can be formulated according to CT examination results, and regular follow-up and nasal medication should be used after surgery to effectively prevent recurrence.