Going to Seoul to find beauty 🏙️ What are the best areas to visit, and where should I stay?

Hi! My name is Jib and I'm from Thailand. I'm planning a trip to Seoul to explore beauty and try out different beauty treatments. I've heard friends talk about Gangnam and Apgujeong, which seem like the main hubs for skincare and beauty enthusiasts. But I'm confused about which area is best. Has anyone been there before?

Regarding accommodation, I'm wondering where would be most convenient for multiple beauty treatments? Should I stay near the city center or in an area with lots of beauty services like Apgujeong? In Thailand, we usually go to clinics, and I plan to visit several times over several days. Any suggestions from those who have been there are greatly appreciated!

Also, I'd like to know which areas you frequent the most and what your experience was like? Did each location have all the necessary kitchens and daily necessities? Thank you in advance! 🥰