When the adenoids are significantly enlarged, it will lead to a significant increase in nasal ventilation resistance, resulting in prolonged open-mouth breathing, more severe snoring and continuous open-mouth breathing during sleep at night. Patients with prolonged open-mouth breathing can easily lead to the appearance of adenoid facial features, such as thickened lips, uneven teeth, high arched palate and other related symptoms, especially for children or adolescents in the growth stage, the impact on facial features will be more obvious. Therefore, patients with severe hyperplasia and enlargement of adenoids need aggressive medication or further surgical treatment to improve their symptoms.