The treatment of periodontitis in adolescents is as follows: 1, medication: for local treatment, periodontal rinsing, medication and mouth rinsing; for systemic treatment, the patient’s immunity can be enhanced, if the inflammation is more obvious, systemic anti-inflammatory drugs can be used; 2, surgical treatment: first of all, supragingival scaling is required, plaque display agents and other drugs can be used to show the location of plaque, for plaque location to do more careful cleaning; and then subgingival If the periodontal pocket is more than 4-5mm, gum removal and root surface leveling surgery is required for treatment; if periodontitis progresses faster in adolescents, it may cause loose teeth earlier and require loose teeth fixation.