About plastic surgery, first, you should understand the meaning of plastic surgery. You can think of it as an investment, and of course there will be gains and losses in investment. Second: See how many parts you want to have plastic surgery. Third: the technology of the hospital and doctor you choose. These factors are all related to the security risks you mentioned, so no one can say that there is no risk at all.
After all, cosmetic surgery requires surgery, and surgery is accompanied by risks (depending on the size of the risks).
But with the current technology, the risk brought by plastic surgery is also extremely small. So don't worry about the risk of plastic surgery.