What preparations are needed for a beauty trip to Korea? What products are you bringing for post-treatment care?

Hi everyone! My name is Oanh, and I'm going to Korea soon for some minor skin treatments. I'm packing and I'm a little worried about aftercare because I'm afraid I won't know what to buy there. Do you have any experience? What do you usually bring from Vietnam or buy there for skincare?

I'm thinking about bringing a cooling face mask, but I'm not sure if it's effective, or if I should buy these in Korea because the quality might be better. There are also some scar patches and soothing gels that I've heard are very good, but I don't know the specific names.

Has anyone else gone through this? What do you usually pack before you go? I'd love to hear advice from those who have. Thanks!