What are the best accommodations and areas for beauty treatments in Seoul?

Hello! My name is Ning, and I'm from Thailand. This year, I want to go to Seoul for the first time for beauty treatments. I'm confused about which area to choose. I've heard about Gangnam and Apgujeong often, but I don't know which one is suitable for me.

Has anyone been to Seoul? Are there any areas you particularly liked? Part of me wants to look good, but another part wants convenience, without having to walk too far. I'm also thinking about accommodation – is it better to stay in the center of Seoul or near my travel destinations?

I'm wondering if anyone has chosen accommodation near areas with many clinics. I'm still confused and would appreciate advice from those who have been before. I'd also like to know how I should prepare. 🙏