The most common cause of frequent sneezing is allergic rhinitis. Allergic rhinitis is mainly a kind of allergic immune reaction that occurs after an individual is exposed to allergens in response to external stimuli. The more common clinical symptoms include itchy nose, sneezing, and runny nose. At this time, sneezing is a reflexive nasal symptom caused by nasal secretions stimulating the nasal cavity or allergens stimulating the nasal nerves, which is mainly a protective reflex that facilitates the organism to clear the nasal secretions and some dust, etc. When examining the nasal cavity for the patient, you can see the nasal mucosa, and the pale nasal cavity can see a large amount of watery secretions. After the appearance of allergic rhinitis, it is first recommended that You can find allergens through blood sampling or skin prick test to know what you are allergic to, so that you can avoid contact, and also some immunotherapy, if you are allergic to dust mites, you can use Changdi for desensitization treatment, the effect is still very good. If allergic rhinitis occurs, it must be treated promptly, otherwise it may develop downward and aggravate asthma. To sum up, if you sneeze a lot, you must consult a doctor in time to rule out allergic rhinitis, and after the diagnosis is confirmed, timely anti-allergic and other symptomatic treatment, the symptoms will generally improve soon.