Infants usually have nasal congestion, which can be caused by colds, allergic rhinitis, adenoid hypertrophy or occupying lesions in the nasal cavity and sinuses. Need to go to the hospital for relevant examination, clear cause and then symptomatic treatment. Common causes: 1, colds: can be caused by a large temperature difference, wearing less clothing, causing bacteria, viruses and other infections of the upper respiratory tract, and then nasal congestion, fever, headache and other symptoms; 2, allergic rhinitis: due to allergies to pollen, dust mites, when in contact with pollen, dust mites, and other allergens, caused by nasal mucosal edema, nasal secretion increases, resulting in nasal congestion; 3, adenoid hypertrophy: can often be due to sinusitis, Congenital nasal stenosis, nasal atresia, recurrent rhinitis, etc.; 4, nasal sinus occupational lesions: this is relatively rare, if there is an occupational lesion here, it will be due to respiratory obstruction resulting in dyspnea. Treatment: 1, drugs and surgical treatment: can follow the doctor’s instructions to use budesonide nebulizer inhaler, mometasone furoate nasal spray treatment of allergic rhinitis, through the surgical way, the removal of hypertrophic glands and nasal sinus occupying lesions. In case of respiratory infections, antiviral treatment with oseltamivir and lenfenpropidium granules is indicated. Through penicillin, cephalosporin antibiotics to treat bacterial infections, oral cetirizine, in order to alleviate the symptoms of nasal congestion; 2, general treatment: you can use a warm towel to apply hot compresses on both sides of the nose, or massage the nose, clean up the nasal scabs in time to keep the infant’s nasal cavity open. Precautions: Infants with short nasal cavity, narrow and rich distribution of capillaries, parents need to be gentle when cleaning the nasal cavity, so as not to cause nasal bleeding. Avoid unauthorized use of medication to prevent adverse effects.