Adenoid hypertrophy in children causes narrowing of the nasopharyngeal airway, blocking more than 1/2 of the nasopharynx, and in some children, even more than 4/6, children’s breathing will be pressurized, resulting in facial bone deformation, protrusion of the maxilla, drooping of the mandible, thickening of the upper lip, uneven alignment of teeth, protrusion of the upper teeth, and shallowing of the nasolabial folds, children’s faces lack expression, and even present a dementia face, once formed it is difficult to recover. Of course, this is the most serious case, and most children show protruding upper teeth. Many parents take their children for orthodontic treatment only to find out that the facial development is abnormal due to adenoid hypertrophy, and experienced dentists will suggest adenoidectomy before orthodontic treatment. In fact, this situation can be avoided by early adenoidectomy to prevent the appearance of adenoid facial features.