The excessive nasal discharge and phlegm may be caused by colds, allergic rhinitis and other reasons. The causes are different and the treatments are different, including general treatments, such as adjusting living and dietary habits, and applying medication when necessary. 1. Cold and flu: patients will have cough, snotty nose, phlegm and other symptoms, which can be relieved by paying attention to rest, avoiding staying up late, drinking plenty of water and taking a light diet, and can also be treated with Lianhua Qingdian capsule and Sanjiu Cold and Flu Granules, etc. If there is a combination of bacterial infection, it can be treated with medicines. If there is a combination of bacterial infection, you can use amoxicillin, cefuroxime and other drugs appropriate anti-infection treatment. 2. Allergic rhinitis: If you are allergic to pollen, animal fur, cotton wool, etc., you will also have nasal congestion, itchy nose, sneezing, a lot of watery nasal discharge, phlegm and other symptoms, which can be treated by oral anti-allergy drugs, such as loratadine, cetirizine, etc., which can help improve the symptoms. The excessive nasal mucus and phlegm may also be seen in other diseases, and the patient should go to the hospital in time for consultation and active treatment. The above medications should be used under the supervision of a physician.