There are many reasons for morning runny nose, most of them are related to allergic rhinitis, viral cold, but also caused by other factors, the diagnosis needs to be combined with imaging and biochemical tests. 1. Allergic rhinitis: Most of the symptoms of rhinitis are characterized by runny nose, accompanied by itchy nose, sneezing and other symptoms. Generally seasonal allergies, it is recommended to carry out allergen testing, avoid allergenic factors, and give anti-allergy treatment, such as loratadine tablets. 2. Colds: mainly viral infections, patients often have poor resistance, stay up late, low immunity, morning runny nose accompanied by nasal congestion, headache, fatigue symptoms. Morning runny nose may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.