The problem of Gua Sha in the shoulder after physiotherapy is a normal phenomenon, which occurs due to local stimulation. If the color is darker, it is a sign of an abnormality. If the color is darker, it represents poor local blood circulation. Dark red represents the presence of heat, such as bright red with the presence of Yang deficiency and fire; black may be the presence of cold; dark purple may be caused by eczema and other problems, which can be adjusted and improved according to the specific situation. Most patients mainly focus on improving local blood circulation, which can achieve certain therapeutic effects. If you’ve got any other symptoms, such as pain in the shoulder, you’ll need a comprehensive treatment to help solve the problem of Gua Sha. The actual fact is that you can find a lot of people who are not able to get a good deal on this kind of things.