Hello, human lengthening is a kind of operation, which is only a simple displacement and does not remove redundant tissue. You can rest assured of that. Generally speaking, the problems you mentioned will not occur after the operation, and the postoperative effect will not involve facial nerves. If it does, it should be an operational problem. If you want to go back, you can. I suggest you choose a regular hospital for plastic surgery, and the safety and effect of the surgery can be guaranteed.