Baby’s nose exhale with rotten apple may be ketoacidosis, sinusitis, bronchiectasis and other causes, through rehydration therapy, saline nasal rinse, antibiotic treatment. The baby’s nose exhale has rotten apple in order to be alert is ketoacidosis, ketoacidosis should be under the guidance of the doctor for rehydration therapy, insulin supplementation, potassium supplementation, alkali supplementation to treat the disease. Baby’s nose exhale with odor may be sinusitis, infection can have odor. You can give the patient with saline nasal rinse to improve the symptoms of sinusitis. If you consider bacterial infection should be given appropriate antibiotic treatment, such as amoxicillin clavulanate potassium, cefaclor and other drugs. The baby’s nose exhale odor may be bronchial dilatation bacterial infection caused by an inflammatory response to consider drug treatment, such as amoxicillin, cefixime. Normally, you can pat your back more to promote the discharge of phlegm. The baby’s nose exhale odor, it is recommended to consult a doctor, follow the doctor’s instructions for targeted treatment.