Scraping is a traditional Chinese medicine treatment. By repeated scraping on the body surface, the skin will appear red or dark red and other "scraping" changes, which has the effects of promoting qi and blood circulation, removing blood stasis and dredging collaterals, expelling toxin and caring skin. However, diarrhea after scraping may be due to catching cold during scraping, or stimulating meridian points related to gastrointestinal tract during scraping.