Please recommend a gua sha.

Gua Sha massage seems to be trending these days haha.

I see a lot of people using gua sha products everywhere, but I've never tried one myself. There are so many products out there, but which one would you recommend? lol

I simply searched for gua sha products on Coupang, and there are so many options with a wide range of prices. Which one would you recommend? Please give me a recommendation!

Will Gua Sha be effective? Haha