A place in Busan that treats toenail fungus well

Does anyone know a good place in Busan to treat toenail fungus?

Are there any good hospitals or shops in the Centum area or Yeonsan-dong Dongnae area?

I think there are some limitations to managing it at home.

It seems to get better, but as the toenail grows back, it reappears.

It keeps repeating, so it's a bit stressful.