Grabbing Gua Sha black bubble to grab a few times, there is no strict limit, there may be a few times or dozens of times, it is best to standardize the operation according to the depth of the condition. Chinese medicine believes that all diseases are the reaction of the physiological dysfunction of the internal organs, meridians inwardly connected to the internal organs, outwardly connected to the limbs and joints. Gua Sha is the use of skin stimulation to regulate internal organs, when there is no gua sha tools, you can use the fingers to pull the skin for gua sha. Different lesions through the Gua Sha treatment, the skin will have different reactions. The skin will only appear red and light red gua sha marks, and the symptoms are more intense, there will be black gua sha marks or black bubbles, and the length of time gua sha marks vary from person to person. So you can’t take the number of black bubbles of Gua Sha as a judgment on the efficacy of the treatment. Need to scrape, Gua Sha and other Chinese medicine treatment, should be timely consultation, by a professional Chinese medicine practitioner or physiotherapist operation, avoid self-operation, so as not to cause adverse consequences.