The phenomenon of runny nose is a bacterial cold, which occurs because bacterial infection of the upper respiratory tract leads to inflammation of the upper respiratory tract, including the inflammation of the nasal cavity, the nasal cavity will be congested and edematous, and the body’s neutrophils will gather in the inflammation of the area, phagocytosis of foreign bacteria. These neutrophils then undergo lysis and necrosis, and mix with the inflammatory exudate to form a thick nasal discharge. Treatment with antibiotics tends to be more effective, and oral antibiotics work better as long as there is no severe infection of the lower respiratory tract. For example, if there is no allergy to penicillin, you can use amoxicillin or amoxicillin clavulanate potassium. If allergies are present, you can try cephalosporin antibiotics, such as cefradine and cefadroxil. If an allergy is also present, levofloxacin can be used in adults, and azithromycin or erythromycin can be used in adults or children for anti-inflammatory treatment.