Generally speaking the correct direction of thigh scraping is to scrape from the top down, you can scrape the bladder meridian on the back side as well as the gall bladder meridian on the outer side and so on. However, patients with varicose veins in the lower limbs and patients with edema should scrape from the bottom up. Thigh scraping scraping lower limbs should be scraped from the top down, scraping the lower limbs rear side bladder meridian, through the Cheng Fu point to the Commission in the point, from the Commission in the point to the tarsal point, the Commission in the point can be re-scraping. When scraping the lower limb lateral foot Shaoyang gallbladder meridian, scrape from the ring jump point to the knee Yangguan point, and scrape from the Yanglingquan point to the Hangzhong point. For patients with varicose veins of the lower limbs and patients with edema, gua sha should be scraped from the bottom up. Skin if there are ulcers, infection, etc., gua sha should be avoided, acute bone and joint trauma, contusion place should not scrape gua sha, encounter joints can not be strong heavy scraping. Gua Sha should be carried out under the guidance of a professional physician, not blindly operate on their own, so as not to cause injury.