The main choice of the back, limbs for scraping, can be based on specific symptoms to other parts of the body. 1. gua sha is in Chinese medicine meridian acupuncture point theory guidance, with edge blunt slippery instruments such as copper, porcelain spoon, buffalo horn, sandalwood board, etc., dipped in water or incense oil, lubricant and so on, in a part of the human body’s skin on the scraping, so that the local skin gua sha spot or gua sha mark, to achieve the blood to blood, detoxification, through the gua sha, to treat the disease of a kind of external treatment method. The location of the fire scraping mainly choose the back and limbs, especially the distribution position of the ducal vein; the large vertebrae, quchi and other points to focus on scraping. (1) back: for the most major and commonly used scraping parts. Take side lying or prone position, or sit on the back of the chair, first from the seventh cervical vertebrae, along the ducal vein from top to bottom scraping to the fifth lumbar vertebrae, and then from the first thoracic vertebrae along the intercostal outward oblique scraping. (2) Limbs: choose the bend of the arm and the bend of the knee. 2. Scraping techniques: in the treatment site with cow horn Gua Sha board (or spoon, coins, coins) dipped in sesame oil (or vegetable oil, onion juice, ginger juice, water, etc.) from the top to the bottom or from the inside to the outside of the repeated unidirectional scraping, until the skin shows crimson stripes or subcutaneous ecchymosis until. When scraping on the acupoints, the technique should be gentle and quick until petechial hemorrhage appears under the skin. Specific medical operations should be completed under the guidance of a medical professional.