Gum recession is generally defined as gum atrophy, which is a change in the position of the gum margin, often due to improper brushing, periodontitis, calculus, abnormal tooth position, lip and buccal tie attachment too close to the gums, occlusal trauma or inappropriate excessive orthodontic forces causing resorption of the bone on the stressed side, or it may be caused by physiological atrophy with age. Physiologic gingival recession can be characterized by crown elongation and bone exposure. Pathological gingival recession can be characterized by a widening of the periodontal space, a loosening and resorption of the alveolar bone, or even a recession of the gums toward the roots of the teeth. The doctor can determine this by observing the position of the gums and tooth surface. Usually, it is difficult to restore the original shape of the flesh of the tooth that has already undergone atrophy. A few atrophy caused by mechanical pressure may recover after removing the mechanical factors. For pulp atrophy that is difficult to recover, only relevant surgical treatment such as lateral gingival flap transfer or free gingival flap grafting can be performed. Therefore, patients are advised to brush their teeth more often, rinse their mouth after meals, floss to remove food debris, drink more water, and regularly visit the dentistry and periodontology departments of regular hospitals for examination and treatment and health maintenance to maintain healthy oral hygiene to prevent further aggravation.