A smile with gums showing is clinically known as a gingival smile. A gingival smile can be caused by vertical overdevelopment of the maxilla, insufficient passive eruption of the maxillary teeth, and excessive movement of the upper lip, which can be corrected by orthognathic treatment, crown lengthening, and muscle paralysis. 1. Orthognathic treatment: Patients with vertically overdeveloped upper jaws may have a gumless smile. Orthognathic surgery can be performed to remove part of the upper jaw and improve the symptoms. 2. Crown lengthening: Gingival smile caused by insufficient passive eruption of maxillary teeth can be improved by removing the gums and, if necessary, part of the alveolar bone tissue to reveal the teeth. 3. Muscle paralysis: Gingival smile caused by excessive activity of the upper lip can be injected with botulinum toxin under the operation of the doctor to paralyze the muscles of the upper lip, which can reduce the gums exposed when smiling. If you want to correct your gum smile, you should go to a regular hospital and be treated under the guidance of a doctor.