What should I pack for aftercare when going on an aesthetic trip to Korea?

Hi! My name is Kae, and I'm planning a trip to Korea in two weeks for a beauty treatment I've been wanting to do for a while. However, I'm a bit confused about the aftercare.

I've read that it's important to take good care of your skin after the treatment, especially in the first week. I'm thinking of packing a lot of things like cooling masks, strong soothing gels, and even silicone sheets to help minimize the appearance of marks from the treatment. Has anyone done something similar?

Do you have any recommendations for items that are actually helpful to pack? And are these items allowed on flights? I don't want to arrive in Korea and realize I forgot something important. Any advice would be appreciated!