I am the kind of person who laughs and shows a lot of gums. When I was a child, I wore braces. There was nothing wrong with my teeth, but my gums were exposed. I checked, too. I think.
This situation may be alveolar bone protrusion, so it is best to go to the hospital to take a dental film and have a look, and then you can do plastic surgery.
Guiding opinions:
Plastic surgery costs about 10000 yuan, and the specific cost is different. It has become a very simple thing to solve gingival smile through surgery. Maxillary protrusion can be corrected by maxillary deformity, but the surgical trauma is large and the recovery time is long.