One-month baby’s nose may be due to upper respiratory tract infection, allergic rhinitis or acute sinusitis and other reasons, according to the different situations to take medication or cleaning the nasal cavity and other ways of treatment. 1. Upper respiratory tract infection: due to infection of the virus invades the nasal mucosa, nasal mucosal lesions, resulting in nasal mucosal edema, nasal congestion. Under the guidance of the doctor, oral antiviral drugs such as antipyretic granules or oseltamivir can be taken for treatment, which can effectively relieve the symptoms. 2. Allergic rhinitis: Babies with nasal congestion, accompanied by itchy nose, runny nose, sneezing and other symptoms, lasting for a long time, may be caused by allergic rhinitis. Parents can use saline for nasal cleaning, but also oral anti-allergy drugs such as levocetirizine, so as to alleviate the symptoms. 3. Acute sinusitis: the baby’s nose is not air nasal congestion may also be caused by acute sinusitis, the child will appear in the nasal cavity increased secretion phenomenon, and there will be localized congestion and swelling of the situation. You can consider spraying physiological sea saline in the nose, can effectively promote the nasal cavity inside the pus nasal discharge outward, relieve the nasal congestion. One-month-old babies with nasal congestion, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.