What are the benefits of traditional Chinese medicine back gua sha?

The benefits of traditional Chinese medicine back gua sha include promoting blood circulation and removing blood stasis, unblocking meridians, and relieving fatigue. Gua sha involves using a special tool to repeatedly scrape and rub the skin surface, causing local areas of the skin to display red petechiae or dark red bleeding spots, thus achieving effects of activating blood flow and eliminating pathogenic factors. The back is generally chosen for gua sha because the midline of the back corresponds to the Du Meridian, while the两侧 (both sides) belong to the Bladder Meridian, which can regulate the essence of the entire body as well as the internal organs.