Baby runny nose for a week is not good, need to clarify the cause of targeted treatment, may be sinusitis, allergic rhinitis and other causes, according to the cause of different, can be improved through nasal cleaning, oral medication or nasal spray treatment. 1. When the baby suffers from sinusitis, resulting in thicker and more nasal discharge, you can use saline to rinse the nasal cavity and clean up the nasal discharge, which will promote the recovery of local inflammation and reduce the secretion of nasal discharge. 2. baby often runny nose is mostly due to the existence of allergic reaction of the nasal mucosa, resulting in snot, runny nose lasts a long time, you can take antihistamines or leukotriene receptor antagonists, such as cetirizine, montelukast sodium, etc., to reduce the inflammation of the nasal mucosa, to alleviate the symptoms of prolonged runny nose. 3. If the baby’s runny nose, sneezing, nasal congestion and other allergic rhinitis symptoms are serious, you can also use glucocorticoid nasal spray treatment, such as mometasone furoate nasal spray, through the nose, can also improve the symptoms of runny nose. If your baby’s runny nose doesn’t clear up in a week, you need to take your child to the pediatrics or ENT department of the hospital to get a clear picture of the cause of the problem and then give targeted treatment. All of the above medications should be used under medical supervision.