Old runny nose, usually due to acute and chronic rhinitis, allergic rhinitis, sinusitis, nasal foreign body and other reasons, need to identify the cause of the disease, the appropriate treatment. 1. Acute and chronic rhinitis: acute and chronic rhinitis is often manifested as congestion and edema of the nasal mucosa, runny nose, nasal congestion and so on. Treatment can be through the use of mometasone furoate spray or ephedrine drops to relieve the symptoms of nasal congestion, you can also take rhinitis tablets and other drugs for treatment. Ephedrine drops are usually applied for no more than 7 days to avoid causing drug rhinitis. 2. Allergic rhinitis: Allergic rhinitis is caused by allergy to certain substances. Treatment mainly includes avoiding contact with allergens, using anti-allergy drugs (cetirizine, cyproheptadine, etc.), and using glucocorticosteroids (budesonide, fluticasone furoate and other nasal sprays). 3. Sinusitis: Sinusitis causing runny nose is mainly antibiotics (cephalosporin antibiotics, azithromycin, etc.), nasal drops (trimethoprim nasal spray, furosemide nasal drops); if severe sinusitis can be treated by surgery. Antibiotics need to pay attention to the history of drug allergies, furosemide nasal drops are generally applied not more than 7 days, so as not to cause drug rhinitis. 4. Nasal foreign body: most common in children, mostly in the ear, nose and throat doctor to remove the foreign body after relief. Old runny nose need to go to the hospital in a timely manner, under the guidance of a physician to identify the specific causes and treatment, not blindly use their own medication, so as not to delay the condition.