A runny nose is usually caused by a cold, allergic rhinitis, sinusitis or a deviated septum. Depending on the cause, it can be treated with medication or surgery. 1. Colds: Colds can lead to symptoms of congestion and edema of the nasal mucosa, and secretions will increase, narrowing the nasal passages, resulting in the symptoms of a stuffy nose. You can take drugs such as aminocrystalline capsules or pseudoephedrine hydrochloride, which can reduce the congestion of the nasal mucosa and relieve the condition of the nose. 2. Allergic rhinitis: mainly due to allergic factors leading to mucosal pallor and edema, the nasal space is narrow, causing the nose is not ventilated. You can use hydroxymetazoline hydrochloride spray, seroquel hydrochloride nasal spray, etc., can contract the nasal mucosal blood vessels, reduce the symptoms of nasal mucosal congestion and edema, and effectively alleviate the situation of the nose. 3. Sinusitis: due to long-term congestion and edema of the nasal sinus mucosa, the normal ventilation function of the nasal cavity is impeded, resulting in the nose is not ventilated. Patients can be under the guidance of professional doctors, the application of decongestants, such as ephedrine nasal drops, hydroxymetazoline hydrochloride nasal spray to reduce sinus mucosal congestion and edema, to improve the purpose of the nose ventilation. 4. Nasal septum deviation: due to the nasal septum to the nose of one side or both sides of the parts of the bend, will lead to the nasal cavity, sinuses and other parts of the physiological function of the disorder, at the same time will block the nostrils and the production of the nose and the symptoms of the lack of ventilation. It can be treated by surgery, which can correct the deviation and restore the condition of the nose. It is recommended that the patient go to the hospital in a timely manner to clarify the cause of the problem and then give targeted treatment.