Nineteen-month-old babies with a runny nose can use physiological sea salt water nasal spray; if allergic rhinitis can be treated with antihistamines; if sinusitis can be treated with antibiotics and other drugs. 1. Colds: colds can cause a runny nose, you can use physiological sea salt water nasal spray to rinse nasal secretions, oral pediatric aminophenol xanthanamine granules symptomatic treatment. 2. Allergic rhinitis: this disease is often triggered by allergic substances, which can cause a runny nose and other symptoms, you can use physiological saline to clean the nasal cavity, and if necessary, you can use antihistamines under the guidance of a doctor (such as cetirizine hydrochloride drops, etc.) treatment. 3. Sinusitis: this disease will cause runny nose, often pus, the presence of bacterial infection can be in accordance with the results of the examination of compliance with the use of cefixime and other anti-infective, but also the use of physiological sea saline nasal spray to clean the nasal cavity and other treatments. Nineteen-month-old infants with runny noses should be promptly consulted by a doctor to diagnose the cause of the disease and then carry out targeted treatment. All of the above medications should be used under the guidance of a doctor, avoid self-medication.