Meridians are the five viscera and six bowels and body skin, limbs, five senses and seven interconnected channels, meridians have the operation of qi and blood, communicating with the body surface and up and down, regulating the functional activities of internal organs and tissues. Meridians through the operation of qi and blood, and yin and yang, so that the body’s functional activities to maintain a relatively coordinated balance, the body to maintain health. Meridian is also the conduction of poisonous pathway, it has the operation of blood, contact the role of the body’s internal and external tissues and organs, so the surface of the poisonous evil can be attacked from the outside of the internal viscera, internal viscera lesions can be from the inside of the surface, are through the meridian of the conduction of the formation of the. Meridian malfunction, qi and blood run blocked, will be in the body surface of a certain part of the reaction, such as pressure points, nodules, skin color changes. The thickness of the arm is generally related to the body fat and thin, nutritional status, exercise, and the meridians are not blocked. If the arm pain, swelling manifestation, it is recommended in the professional physician under the guidance of treatment, not blindly self-medication.