Do you have any recommendations for areas and accommodations for a beauty trip to Seoul?

Hi everyone! I'm Peiyu from Taiwan. I'm planning to go to Seoul this year for a beauty treatment, but honestly, I'm a bit unsure which area to choose. I've heard there are many clinics in Gangnam and Apgujeong, but I'm not sure if staying there would be more convenient, or if staying in Myeongdong or elsewhere would also be okay?

I mainly want to get some treatments done, but I haven't decided on the specifics yet. Have any foreign friends stayed in Seoul for beauty treatments? Where did you choose to stay? Gangnam seems to offer more options, but I'm wondering about transportation and accommodation costs. I'm also considering staying a few more days so I can rest and do some shopping after the treatment.

If anyone has experience, I'd really appreciate your advice! Especially regarding accommodation and your experiences in different areas. Thank you!