The phenomenon of sneezing and running nose may be caused by repeated acute attacks of chronic rhinitis, allergic rhinitis or vasomotor rhinitis. 1. Repeated acute episodes of chronic rhinitis: acute episodes of chronic rhinitis caused by repeated viral infections due to low resistance, sneezing and runny nose can also occur when the nasal cavity is stimulated. 2. Allergic rhinitis: a chronic allergic disease of the nasal mucosa mainly characterized by episodes of sneezing, runny nose and nasal congestion after exposure of susceptible individuals to allergens, such as pollen particles and dust mites. 3. Vasomotor rhinitis: inflammation of the nasal mucosa induced by nervous system dysfunction or external stimuli, with the main symptoms of sneezing, runny nose and nasal itching. If the above symptoms occur, it is recommended to actively seek medical attention to identify the cause of the disease and cooperate with the doctor for targeted medication and treatment.