Sagging after facial bone surgery.

25y/o, did cheekbone (protuded cheeks, typical amongst asians) and long cut jaw reduction and genioplasty(chin moved forward,elongated the chin with my bone) 3weeks ago to create a smaller face. there's high risk of sagging. what permanent treatments can reduce double chin, sagging skin/tissue and fat to make the jawline tight and defined? how early can i do it? are there any non-surgical treatments? my saliva gland looks even more obvious now

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