* What is gwalsa?
A folk remedy that has been passed down in China for thousands of years, gwalsa is a traditional secret of the royal palace, and its medical principle was introduced in Hwangjenaegyeong, a famous Chinese medical book.

A combination of the Chinese words gwal, which means rubbing or scraping, and sa (disease), which means disease, gwalsa is the term for meridian scraping. This is a kind of physical oriental therapy that involves repeatedly stimulating the meridian system and spots on the body suitable for acupuncture with a round-edged tool.