GuaSha

A scraping technique with a Gua Sha stone

GuaSha is a rubbing technique

GuaSha is a technique which allows pathogens to "come out" from the skin according to the concepts of Traditional Chinese Medicine, SHA. (SHA being a concept of "pervert", of aggressor being able to be the cold, the heat, the humidity).
The Gua Sha is a little closer to hammering techniques (Gua Pak) and pinching techniques (Gua Tsien). They therefore make it possible to free the surface of the skin.

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Clear the surface before settling internal diseases

Treating a so-called "internal" disease, when the "perverse" energy blocks the surface of the body may reinforce its virulence. For this, in Chinese medicine, we never treat a chronic disease before having freed the surface of the body, in other words: the skin and the mucous membranes.