My whole life has been like that. Not that it compares with your situation but I've always bordered on obsessive when it came to my skin as well. I removed a bunch of freckles, skin tags, moles one at a time, during my 30's Using sticks of red hot cedar twigs. Yeah embers. It worked but took many bandages and chilling at home.
You have no idea how much people you inspired. I also used to be like you before, i was 420 pounds at 6 1, 21, years old, felt like shit, and i was fat for my entire life. When i was a teenager i weighed around 220 pounds to 280 in my highschool years. I got bullied alot but i didnt give a flying fuck so i kept on eating more. It then hit me when 3 years ago, my mom passed from breast cancer. I was so depressed and i remember when my mom always encouraged me to lose weight, and for the first time, i fealt fucking motivation. I did this for my mom.I went on runs, did strength training, boxing, biking, etc. It took me 3 years and i now weigh 218 (last time i checked) and i used to have loose skin but i got surgery and i barely have any anymore. and if any fat guys are reading this, anything is possible.
