A runny nose can be caused by colds, allergic rhinitis, etc., mainly under the guidance of the doctor for anti-cold, anti-allergy, nasal rinsing and other treatments. If the runny nose is caused by a cold, you can take cold medicine, such as acetaminophen extended-release tablets. If it is caused by pollen allergy, you can take anti-allergy medication, such as loratadine tablets and cetirizine hydrochloride tablets. If it is too much dust that stimulates a runny nose, it may be accompanied by coughing and coughing up phlegm, so you can use physiological seawater nasal spray or saline to clean the nasal cavity. Once the symptoms of clear nasal discharge, it is recommended to go to a regular hospital as soon as possible to find out the specific causes, and actively cooperate with the doctor’s medication.