What skincare products do people bring when they come to Korea for beauty treatments?

Hi ladies! I'm flying to Korea next week for a minor post-treatment treatment, and I'm a little nervous, especially about the aftercare. I'm wondering if I should bring some products from China, worried I might not be able to find suitable ones or encounter problems there.

I'm considering bringing cooling face masks, silicone scar patches, and soothing gels. However, I'm unsure if clinics in Korea will provide these, or if I can buy them at local convenience stores. Has anyone been there before and could share what products you brought? What are the essentials, and what's optional?

Also, I'd like to ask if there are any specific precautions I should take when using these products? I'd love to hear your experiences so I can pack more confidently. Thank you all!