Nicole Montgomery has been a cosmetic nurse for over seven years, which means she’s been on the firing line for the good, the bad and the extremely horrible when it comes to seeings – and treating – plastic surgery gone wrong.

“I’ve seen many weird things,” she reveals to, and, in order to promote more good than Heidi-Montag-bad she’s founded Trusted Surgeons, a not-for profit to educate people embarking on cosmetic surgery. Here, she outlines four of the worst experiences she’s encountered, and shares advice on how to ensure you don’t end up on this list.