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

My name is Hang, and I'm planning to fly to Korea for some minor beauty treatments. I intend to bring some skincare products from home, but I'd also like to know what everyone usually prepares for recovery in the first few days. Has anyone ever brought things like cooling masks, silicone patches, or soothing gels? I'm not sure if I should buy anything beforehand or wait until I get there to buy them.

I've heard that many skincare products in Korea are quite good, but I don't know which brands are trustworthy. Anyone with experience, please help me out! I want to be well-prepared so that my recovery days will be more comfortable. Thank you so much! 💙