Can you recommend a good area of ​​Seoul for beauty treatments, plus suitable accommodation?

Hi! My name is Nan, and I'm from Thailand. I'm planning a trip to Seoul in a few months for beauty treatments 😊 I've heard that Gangnam and Apgujeong are very popular for beauty services, but I'm confused about which area is better for me.

For those of you who are foreigners and have been to beauty clinics in Seoul, which areas did you like? Was accommodation easy to find? I'd like to know how each area differs, because I want to choose an area that's convenient and doesn't require much walking 😅

Also, regarding accommodation, should I stay in one area the whole time, or can I visit several areas? My budget is okay, but I'm open to higher prices. Could you recommend which areas people usually choose for their beauty treatments? Thank you so much!