Protruding mouth is a common oral problem, and there are many ways to improve it. If your convex mouth is caused by dental problems, you can improve it by simple orthodontics. If your mouth is protruding because of a bone problem, you need orthognathic surgery to improve it.

In addition, if your convex mouth is a false convex mouth caused by chin retraction or nose bottom depression, and you don't want to move the knife pad prosthesis chin/nose bottom, you can consider playing hyaluronic acid to improve it.