The symptoms of nasal congestion and sneezing are not necessarily allergic rhinitis, but may also be cold, vasomotor rhinitis and other diseases, the occurrence of nasal congestion and sneezing should be promptly consult a doctor for a clear diagnosis. 1. Allergic rhinitis: usually caused by allergens such as pollen, dust mites, fungi and other allergens stimulation, the main manifestations of nasal itching, a large amount of watery nasal discharge, paroxysmal continuous sneezing and nasal congestion and other symptoms, accompanied by a loss of sense of smell in some patients. 2. Colds: Colds are acute upper respiratory tract infections, mainly manifested as nasal congestion, sneezing, runny nose and other symptoms, sometimes accompanied by headache and fever. 3. Vasomotor rhinitis: mostly caused by autonomic dysfunction, mainly manifested by symptoms such as runny nose, nasal congestion, sneezing and nasal itching. Patients who have frequent sneezing, nasal congestion and other symptoms should go to ENT in time to get medical treatment to clarify the cause and carry out appropriate treatment.