Non-stop sneezing and runny nose may usually be caused by cold or allergy, as follows: 1. cold: viral infection is the most common, usually occurs in winter and spring, and is more likely to occur when the body’s immunity is low. 2. Allergy: In case of allergic rhinitis, the patient can have itchy nose, nasal congestion on both sides, paroxysmal sneezing and clear water-like nasal discharge. In the treatment method, first of all, we should avoid contact with allergens, and in the choice of drugs, we can choose antihistamines.