There is no fastest solution for children’s runny nose, it needs to be treated according to the cause of the disease, common allergic rhinitis, upper respiratory tract infections, etc., the treatment is mainly based on supportive therapy and drug therapy. 1. Allergic rhinitis: children with allergic rhinitis may lead to frequent runny nose, need to identify and avoid contact with allergens, pay attention to the cleanliness of the indoor environment, and in serious cases, need to use related drugs, such as mometasone furoate, fluticasone and other nasal spray hormones. 2. Upper respiratory tract infections: mostly caused by viruses, generally do not need special treatment with antiviral drugs, supportive treatment can be, pay attention to light diet and keep warm, avoid secondary bacterial infections. If it is caused by influenza virus, it can be treated with antiviral drugs such as oseltamivir. Children who have been suffering from runny nose for a long time are advised to consult a doctor for a clear diagnosis and targeted treatment, so as to avoid delaying the treatment time. The above medications should be taken under the guidance of a doctor and should not be used on their own.