Baby runny nose may be due to irritating gases, sinusitis, colds and other causes, can be quickly discharged by avoiding the smell of irritating gases, position drainage, medication and other methods. 1. Irritating gases: because the baby’s age is relatively small, the body organs have not been developed, the nasal mucosa will be more sensitive, if the inhalation of irritating gases, it will be easy to cause irritation of the nasal mucosa, resulting in a runny nose. Parents can make the baby away from irritating gases to reduce the production of snot, but also can adjust the baby’s position to promote the discharge of snot. 2. Sinusitis: If the baby suffers from sinusitis, it will lead to the baby’s runny nose, often accompanied by nasal congestion, headache phenomenon. Parents can use mucolytics and positional drainage to promote the discharge of nasal mucus under the guidance of the doctor. 3. Colds: generally caused by cold, the baby’s body immunity is relatively poor, it is easy to appear the disease, causing the baby runny nose, accompanied by sneezing, coughing symptoms. Can be under the guidance of the doctor, the use of anti-infective drugs and mucus solubilizers, can dilute the nasal mucus, is conducive to the rapid discharge of nasal mucus. If the above methods, the baby’s runny nose symptoms are not relieved, or accompanied by other symptoms, it is recommended to seek medical advice in a timely manner, under the guidance of the doctor to improve the relevant examination, to clarify the cause of the disease, targeted treatment or treatment.