What do you bring back for skincare after getting beauty treatments in Korea?

My name is Kim, and I'm planning to fly to Korea to try some beauty treatments. I know that the recovery phase after these treatments is quite important, but I'm not sure what to pack. Have any of you had experience with beauty treatments there? What products do you usually bring to care for your skin after treatment?

I'm thinking of buying some cooling face masks; someone said they're very helpful in the first few days. I also want to learn about gentle gels or scar patches to aid the recovery process. But I don't know which ones to choose, and whether I should buy them in advance or buy them in Korea when needed?

I'd really appreciate any advice! If anyone has gone through this before, could you share your experience? I want to be as well-prepared as possible so that the post-treatment care goes smoothly. Thank you so much!