No cold nose not pass gas nasal congestion, may be nasal foreign body, nasal polyps, nasal septum deviation and other diseases. 1. Nasal foreign body: the incidence of children’s nasal foreign body is higher. The cause may be due to the infants and young children in the process of playing, the smaller size of the toys and other foreign objects into the nasal cavity caused. The presence of foreign body will affect the ventilation function of the nasal cavity and cause nasal congestion; 2. Nasal polyps: Infection, allergic reaction, heredity, drug side effects and other factors can lead to long-term swelling of the nasal mucosa, hyperplasia and polyp tissue. Polyps can lead to narrowing of nasal cavity and cause symptoms of nasal congestion; 3. Nasal septum deviation: abnormal development of the nasal septum, nasal trauma and nasal occupational lesions during the onset of the nasal septum can lead to nasal septum deviation to one or both sides of the nasal cavity, affecting the ventilation function of the nasal cavity to cause nasal congestion symptoms. It is recommended to analyze the cause of nasal congestion according to the patient’s past medical history, other clinical symptoms accompanying the onset of the disease, as well as the results of nasal endoscopy, nasal imaging and other related examinations, and then follow the doctor’s instructions to standardize the use of medication and treatment.