Gua Sha is a traditional east asian healing modality. It is commonly referred to in the west as "scraping."  I use a host of custom-designed smooth-edged stainless steel tools to fit different parts of the body.  I continuously stroke the tools over the sore area to increase blood flow to the injury.  When we are injured we we need fresh blood to heal ourselves.  The coloration is a positive sign, showing you where the trauma is exactly and that it is receiving fresh blood. Most common ailments for scraping are neck pain, congestion, foot and joint pain. A randomized controlled trial showed gua sha to have beneficial short-term effects on pain and functional status. Results are immediate!