Adenoid hypertrophy is a common ENT disease, mostly seen in infants and young children aged 5 to 7 years. Before surgery for adenoid hypertrophy, the blockage of the posterior nasal aperture can cause edema, inflammation, and purulent secretions in the sinus and nasal mucosa, leading to an unpleasant odor in the nasal cavity. Patients with adenoid hypertrophy usually need to undergo adenoidectomy using a plasma knife. After the surgery, local burns can cause necrosis of the mucosa, resulting in bad odors in both the nasal and oral cavities. Therefore, for patients with adenoid hypertrophy, the main approach is to maintain oral hygiene, which can help reduce the unpleasant nasal odors.