Non-stop sneezing is common in allergic rhinitis, colds, etc. It may also be a physiological reaction caused by stimulation of the nasal mucosa. 1. Physiological reaction: sneezing is a normal reflex of the human body to allergic substances. If there are small insects, foreign objects or irritating odors in the nostrils, the nostrils will be stimulated to cause a sneezing reflex, which is a normal physiological manifestation and generally needs no treatment. 2. Allergic rhinitis: Allergic rhinitis refers to paroxysmal sneezing caused by contact with allergens, for example, it is easy to develop during the pollen season every year, and it may be accompanied by loss of sense of smell, headache and other manifestations. 3. Cold and flu: After the body is cold or the resistance is reduced, due to germs infection, cold and flu symptoms are likely to occur, it will cause the nasal mucosa to undergo inflammatory reactions such as congestion, swelling, increased secretion, etc. The release of influencing factors will stimulate the human body to have recurrent sneezing. When the patient has the symptom of incessant sneezing, he should go to the hospital in time, clarify the cause of the disease under the guidance of the doctor, and carry out reasonable treatment.