Asymmetry after maxillofacial surgery. Any suggestions?

7 months ago I underwent surgery for class II malocclusion and genioplasty, but now my face looks bigger and fatter than before, less defined and asymmetrical, and I have the feeling that the muscles beneath the skin are "hard" and swollen. In addition, I feel pain when I open my mouth to eat and the sensibility of the chin is altered, so as to perceive an intense discomfort to the touch.

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