It is suggested that you can wash your nose with normal saline and your nasal cavity with normal saline. If the constant pressure spray nasal washer can be equipped, normal saline can be sent to the posterior nasal cavity and paranasal sinuses, thus cleaning the whole nasal cavity more thoroughly and effectively, removing allergens and pathogenic bacteria in the nasal cavity in time, preventing them from accumulating in the nasal cavity to stimulate the infected nasal mucosa, and eliminating edema and inflammation. This is a kind of physical therapy, which is safe and harmless without medication, but the curative effect is not as fast as taking medicine, but it will be slower. If you insist on using it, you can continuously improve the self-detoxification function of the nasal cavity, and you can deal with it yourself if allergens enter the nasal cavity in the future. Regular maintenance can also reduce recurrence.