Ladies, what should I prepare for after-care when traveling to Korea for beauty treatments?

My name is Giang, and this is my first time planning a trip to Korea for some minor cosmetic procedures. I want to prepare beforehand so I can take good care of myself after the procedure, but I'm really not sure what to buy. I'm thinking about buying cooling masks, silicone scar patches, or soothing gels, but I don't know which ones are really useful and which ones would be cheaper to buy there.

Have any of you ever gone to Korea for beauty treatments? What items did you prepare for the recovery period? Please share your experiences. I need to know if I should prepare them from Vietnam or if I can buy them locally. Thank you so much!