Baby has been running nose may be physiological factors, may also be pathological factors, such as colds, allergic rhinitis, etc., need to consult a doctor in a timely manner, to identify the causes of the treatment. 1. Physiological factors: hot and cold stimulation, the nervous system regulation function is not perfect and other physiological factors, may cause the baby has been runny nose phenomenon, can be cleaned up the nasal cavity, keep warm, go out and wear a mask can relieve the symptoms. 2. cold: baby cold will have a runny nose, nasal congestion and other symptoms, can be recommended under the guidance of a doctor, hot compresses on the nose, clean up the nasal passages, if necessary, follow the doctor’s instructions to take the appropriate medication, such as bacterial infections can be applied to the application of antibacterial drugs, such as cephalexin. 3. Allergic rhinitis: If the baby is allergic to a material runny nose, you need to go to the hospital to detect allergens, to avoid re-exposure. At the same time, under the guidance of a professional doctor to take symptomatic drugs to alleviate its symptoms, and to saline nasal cleaning. If your baby has a runny nose all the time, you should consult a doctor to find out the cause of the problem and treat it. Do not use medication at home privately or delay, so as to avoid delaying the condition.