Which area in Seoul do foreigners like best for beauty treatments? Gangnam or Apgujeong?

Hi everyone! My name is Ha, from Vietnam, and I'm planning to fly to Seoul next month to try some beauty services. I'm so confused because there are so many options 😅 I've heard that Gangnam and Apgujeong are both very popular, but I don't know which one to choose for convenience in getting beauty treatments and having good accommodation.

Have you guys been to these areas before? I want to know which one has many beauty spots, is easy to get around, and has reasonable accommodation for tourists. A friend told me Gangnam is convenient for shopping, while Apgujeong has a more upscale vibe but I don't know if it's more expensive. Does anyone have any experiences to share?

Also, how long do you usually stay when traveling to Seoul for beauty treatments? I plan to stay for about 5-7 days. Which area should I prioritize first? Thank you so much! 💕