What do you guys buy for aftercare following beauty treatments in Korea?

Hi everyone, I'm Ngoc and I'm planning to fly to Korea for some minor procedures. I'm making a list of things to bring for aftercare, but I'm a little confused about what to buy.

I've heard that cooling masks, silicone patches for scars, and soothing gels are very popular and easy to find there. But I'm not sure if I should buy them in Vietnam beforehand or wait until I get them in Korea. Do you have any experience with this? If anyone has brought back any aftercare items, could you share them with me?

I'm also worried about forgetting something important. Can anyone suggest some really helpful items? I would be very grateful! 🙏