If you do not have a cold but keep sneezing, you should consider having allergic rhinitis. Allergic rhinitis is caused by a decrease in the patient’s immune system and the simultaneous invasion of allergens, such as cold air, sulfur dioxide, ammonia, oil fumes, dust mites, industrial waste gases or a diet high in protein, including milk, soy milk and eggs, which induce a hyper-reactive state of the nasal mucosa. In this case, there is obvious congestion and edema of the nasal mucosa, and inflammatory secretions exude, which irritate the nasal mucosa and cause continuous sneezing symptoms. Anti-allergy medications are usually given clinically, including paracetamol, cetirizine, ketotifen, and montelukast. If necessary, glucocorticoids, such as budesonide nebulizer, can also be sprayed into the nasal cavity and can relieve the symptoms.