Plastic beads
There seems to be no special method, and the least trauma can only be injection.

Injection lip bead plastic surgery

This method is gradually being widely used. General injection materials include collagen or the mixture of collagen and PM-MA, hyaluronic acid, autologous fat, etc. This method is suitable for most imperfect people in lip bead, and has the advantages of less trauma, no scars and no rejection.