It's a really tricky subject and one close to my heart. I am a firm believer that the age of consent for plastic surgeries should be raised to at-least 21.
I had a boob job when I was 18, my consultations started when I was 17 and within 2 weeks of my 18th birthday I'd had the surgery. I didn't tell my parents or anybody apart from one friend who I put as my emergency contact. I took out a crazily high interest loan (that I should never of been approved for!) and did it. It was completely reckless.
They request your records from your GP, and I'd read up online that if they believed you to not be mentally in a place to make this decision that they would cancel the surgery. I lied and denied that I was on anti depressants and was terrified of being busted when they checked my GP record, but they never even mentioned it and the surgery went ahead.
I was incredibly naive, getting surgery for all of the wrong reasons and honestly had no idea what I was getting in to. I spent two weeks recovering on my own in a shitty hotel in Slough and ended up with an infection from not taking good enough care of myself. My follow up care was practically non existent, and overall the entire thing was a really horrific experience and something that I personally believe shouldn't of been allowed to happen.
Yes, you can argue that I was an adult and knew what I was doing - but I largely disagree and know that now, at 28, I would never make that decision now, and am horrified by how unsafe it was. It upsets me how commonplace surgery is now, and I worry for these young girls getting all this work done. I'm not against plastic surgery whatsoever, in fact I've been contemplating rhinoplasty, but as an actual adult, who is mentally stable, financially able to afford it and not, well, reckless. Just my two cents anyway.