Quite confused! What should I bring for post-Korea recovery? Need urgent recommendations.

Hello, my name is Praew, and I'm planning a trip to Korea for some beauty treatments soon. I'm currently packing my things from local shops at home, but I'm worried I might forget something important. I wanted to ask you all who have been there before: what kind of items do you usually bring for post-treatment recovery, such as cooling masks, gel patches, or anything else?

I know that clinics in Korea will likely provide some items, but I'd like to bring some extra things from home for peace of mind. At first, I thought about buying them in Korea, but I'm afraid they might be expensive or hard to find. I'd like to know what items people have brought from Thailand and what has been genuinely useful.

Please give me some advice. Thanks in advance!