Adenoid facies in adults requires reconstructive surgery to improve the appearance of the face by retracting the maxilla. If an adult develops adenoid facies, it is usually not relieved by medication or surgery. Plastic surgery is the only way to improve the face. Clinically, the cause of adenoid facies is that adenoids are overly enlarged during childhood, which can block the nasopharynx and cause children to open their mouths to breathe when they sleep, thus causing abnormal development of the maxilla, resulting in the appearance of the maxillary bone to become longer, the palate bone is high arched, the upper incisors protruding, and the upper lip upturned, etc. The adenoids are not present during childhood, but they are not present at all. If adenoids are not treated during childhood, once the adenoid face is formed, there is no way to improve the face in adulthood through conventional treatments such as medication or surgery. The only way to improve the adenoid face in adulthood is to have the elongated maxilla partially amputated and removed by plastic surgery.