Runny nose in 2-year-old babies can be caused by common cold, chronic rhinitis, sinusitis and so on. Parents need to take their babies to the hospital in time to get a clear diagnosis and then treat the symptoms. Common causes and treatment 1, cold: most of them are induced by cold, climate change, caused by germs when the baby’s body resistance decreases, mainly manifested as runny nose, cough, headache, limb aches and pains, etc. Follow the doctor’s instructions for symptomatic treatment. Strictly monitor the body temperature, if the temperature rises, to withdraw heat treatment as appropriate, try to light diet, such as soft noodles, green vegetables porridge, etc.; 2, chronic rhinitis: patients will appear runny nose, nasal itching, nasal congestion and puffiness around the eyes and other symptoms. The nasal cavity can be rinsed with saline as prescribed by the doctor; 3, sinusitis: mostly secondary to acute rhinitis, is a purulent inflammation of the mucous membrane of the nasal cavity, mainly manifested as runny nose, nasal congestion and headache. It can be treated with antibiotics under the guidance of a professional doctor, and nasal rinses and local hot compresses can be applied to improve the symptoms. It is recommended to let your baby rest more and ensure regular rest and sufficient sleep to improve body resistance. You can drink warm water to dilute and help discharge nasal secretions.