Gua Sha is a traditional Chinese medicine therapy that stimulates the skin to promote blood circulation and metabolism. Its main effects and functions include:

1. Promoting Blood Circulation and Removing Blood Stasis: Scraping the skin to promote blood circulation and metabolism helps to dissipate blood stasis and local edema. This technique unblocks meridians, regulates qi and blood, and promotes the discharge of dampness and toxins. It also dispels wind and cold, improving symptoms of conditions like colds.

2. Relieving Spasms and Pain: By regulating qi and promoting blood circulation, Gua Sha helps unblock meridians and relieve pain, such as discomfort caused by breast hyperplasia.

3. Regulating Yin and Yang, Strengthening Internal Organ Functions: Specific techniques and directions in Gua Sha can harmonize yin and yang, improving the functions of internal organs.