Finally heading to Seoul! I'm thinking about trying Korean skincare management — is there anything I absolutely shouldn't miss?

Hey everyone! I'm Jia, and I'm finally heading to Seoul on a business trip next month. I'm thinking of taking the opportunity to try out the legendary Korean skincare treatments. My skin has been looking a bit dull and dry lately, so I'm really keen to experience some of Korea's skincare services. Honestly though, I don't know much about this at all, and there's so much conflicting information online that I'm not sure where to even start.

I've heard Seoul has tons of professional skin management centers, but I'm not really sure what I should prepare before going, or which treatments would be best suited for my skin condition. Has anyone here done skincare treatments in Korea before? Would you mind sharing your experience? I'm particularly curious about how to choose for your first visit and whether it's super expensive.

Also, I'm currently using some domestic skincare products, and I'm not sure if I need to bring anything special with me or if there are any must-buy skincare products locally that are worth trying. I'd be really grateful if anyone could offer some advice!