1, the "blue veins" on the hand: the blue veins on the hand have a great relationship with the viscera. 1) The veins stood out on the back of the hand: It is suggested that back stagnation can easily lead to lumbar muscle strain, fatigue and fatigue, and common backache. The more prominent, the more blue veins on the back of your hand. 2) Finger blue veins: Finger joints represent the transverse colon of human body. Children suggest gastrointestinal dyspepsia, and adults also report head vascular microcirculation disturbance, insufficient blood supply to cerebral vessels, head discomfort, dizziness, headache and stroke in severe cases. If the blue veins at the phalangeal joints indicate that it is a human head problem, the blue veins at the transverse lines of the metacarpal joints of the middle finger will appear if they are twisted in purple-black, suggesting that the cerebral arteries are hardened, and the child does not represent the head temporarily, indicating gastrointestinal stagnation and indigestion. There are "blue veins" on the horizontal stripes of adult index finger and palm, suggesting that the left side is prone to scapulohumeral periarthritis. There are "blue veins" on the horizontal stripes of the little finger palm, suggesting that the right side is prone to scapulohumeral periarthritis. There are prominent and twisted "blue veins" in the transverse stripes of the metacarpal joints of the thumb, suggesting that the coronary artery of the heart is hardened, purple-black is the onset of coronary heart disease, and stroke is related to the large intestine. Ring refers to the stagnation of blue veins in children and endocrine disorders in adults. 3) Palm blue veins: thenar blue veins below the thumb often affect low back and leg pain and rheumatic joint pain of lower limbs. Wrist stripes have "blue veins" crossing, indicating that there are problems in the urogenital system, which often affect gynecological diseases, such as irregular menstruation, heavy humidity and excessive leucorrhea. Neiguan (the distance between the three fingers on the wrist) is the place where the pericardium passes, so it has a great influence on people's mind. There are "blue veins" in Neiguan, which often indicate heart diseases, such as myocardial strain, upset, stuffy heart, heartbeat, insomnia, dreaminess and so on. The distribution of blue veins in Neiguan is also very important. The closer the blue veins of Neiguan point are to Neiguan point, the earlier the heart symptoms appear. The more prominent, twisted and purple-blue the vein of Neiguan point is, the more serious the symptoms of heart disease will be, even indicating that heart disease will occur seriously. There are "blue veins" on the inside of the lifeline, which are more common in the metabolic problems of liver and gallbladder functions, and are easy to cause bitter taste, dry mouth, irritability, chest tightness and liver disease. There are "blue veins" at the beginning of the lifeline of the tiger's mouth, and women are more common in breast pain before and after menstruation. You can even see the "blue veins" in the palm of your hand between your fingers, suggesting that the intestines are stagnant, mostly habitual constipation or venous tumors and hemorrhoids. Blue-purple "blue veins" can be seen everywhere in the palm of your hand, indicating that gastrointestinal stagnation, high blood fat, high blood viscosity, high blood pressure, high blood acidity, low oxygen content and blood coagulation are prone to dizziness, headache, fatigue and weakness.