I have very little swelling and my skin is very thin and has no fat. From the time I was in middle school to the age of 24, I had double treatment four times. Recently, I had it done with a complete incision, but before that, I only had it pricked. After the first cut, the line got thinner, so I had it done once more for free. But as a few years went by and I became an adult, one line sometimes went missing. I couldn't stand having only one side of my body sore, so I looked into another hospital and had my third double treatment. The doctor said I could have it done again (I told him about my past history), but when I went to see him a month later, I thought there was some swelling and the lines were clear, but the doctor said Next time Seon gets double-handed, make an incision haha. That's why I said something, but I ended up doing it again this time. I made an incision this time, but it won't come off again. ㅠㅠ Maybe it's because it's not as thick as the third time, so the swelling seems to go down faster, and even though it opened more than a centimeter the third time, When I opened my eyes, it was all hidden... As someone who has had a lot of experience with double-handed surgery, it is most important to know what your constitution is in order to have a successful surgery. If your skin is very thick, you need to draw a thin line from the beginning (thick skin causes swelling to go down later). For some people, it takes more time for it to become natural) Later on, the lines look pretty with an appropriate thickness and not too thin. If you have thin skin, even if you have a lot of it, it will be hidden, so I think it's most important to know your skin thickness.