Sisters, which district is good for a beauty trip in Seoul? Looking for accommodation recommendations!

Hi everyone! I'm Ping from China. I've been planning a beauty trip to Seoul lately, hoping to rejuvenate myself during the holiday and experience the charm of K-beauty! It feels like it's been ages since I've truly pampered myself, and I'm super excited for this trip!

I've seen many girls mention Gangnam and Apgujeong as popular beauty areas. I'd like to ask what the specific advantages of these two places are? For example, are there more skin management clinics or a higher concentration of minimally invasive cosmetic procedures? Besides these two areas, are there any other hidden gems you think are worth visiting? I'm interested in basic skincare and anti-aging/lifting treatments, but I haven't finalized my plans yet.

Also, do you have any suggestions for accommodation? Which area would be convenient for visiting these beauty salons while also offering good shopping and dining options? I'm hoping to find a place that's easily accessible and reasonably priced. Of course, recommendations for comfortable and stylish accommodations are also welcome. I'm still figuring out my budget!

This is my first time going to Seoul for a beauty treatment, so I'm a little nervous but also very excited! I hope you can give me some experience and advice. Thank you in advance!