The white lines that Chinese medicine practitioners pick out of the back are subcutaneous white fibers, which can also be described as diseased tendons. Chinese medicine practitioners pick out white fibers or diseased tendons from the back, called “picking the back method”, belongs to a kind of Chinese medicine needle picking therapy, but also representative of a characteristic external treatment method. Needle picking therapy is a kind of non-pharmacological therapy that uses special needles to pick and prick the diseased area to pick out the subcutaneous white fibers or diseased tendons from the treated area to cure the disease. The therapy is characterized by easy operation, safety and reliability. It can be widely used in the treatment of respiratory diseases, neck, shoulder, waist and leg pain, digestive system diseases, etc. It not only occupies an important position in the treatment of diseases in ancient times, but also has become a national key to explore the characteristics of the therapy. Specific operation must be carried out by professional physicians, do not operate blindly, in order to prevent the condition from being misplaced.