There are many causes of axillary lymphatic blockage, such as diseases of the lymphatic system, diseases of the blood system, and systemic diseases. The hazards of axillary lymphatic blockage include: a. Lobular hyperplasia, breast hyperplasia, and even breast cancer in serious cases. Second, affect the detoxification of the six meridians of the arm, such as the large intestine meridian, the triple jiao meridian, the small intestine meridian, the lung meridian, the pericardium meridian, and the heart meridian. Three, causing the upper limbs of the arms fat. Fourth, the lymph under the armpit is dark in color, and there are side breasts. Fifth, the meridians of the shoulder and neck are blocked. Therefore, underarm lymph blockage should be prevented and treated according to the cause.