Clear runny nose needs to clarify the cause of clear runny nose, common diseases include: allergic rhinitis, cerebrospinal fluid nasal leakage, acute rhinitis and so on. According to the cause of the disease under the guidance of the doctor to choose targeted treatment or can control the symptoms of running nose, such as: anti-allergy, surgical treatment, anti-infection, etc.. 1. When contact with allergens causes runny nose, it is necessary to get out of the allergic environment in time, and if necessary, anti-allergic drugs such as loratadine can be taken under the guidance of a doctor. 2. Cerebrospinal fluid leakage after trauma may also cause symptoms similar to runny nose, you can improve the relevant examination to clarify the size, location and degree of condition of the fistula, choose conservative treatment or surgical repair methods of treatment. 3. Running nose caused by acute rhinitis can be relieved by using furosemide nasal drops, budesonide nasal spray and antiviral drugs such as ribavirin. If the runny nose continues to be bad or occurs frequently, it is recommended to consult a doctor for a clear diagnosis and follow the doctor’s instructions for medication and treatment.