[Neonatal nasal obstruction].

Because neonates are obligate nose breathers, neonatal nasal obstruction may have serious consequences. Prompt diagnosis and appropriate treatment are essential to avoid severe hypoxia. The most common cause of neonatal nasal obstruction is rhinitis. However, it is essential to first rule out anatomical causes such as choanal atresia and stenosis, pyriform aperture stenosis, traumatic deformation or tumors, as these conditions may be life-threatening and require prompt surgical treatment.