1.Causes 1.Weak endowment, feeling external evil: weak endowment, weak constitution, insufficient kidney energy, feeling the evil of the six leucorrhoea or epidemic poison, external evil wants to enter through the meridian, depressed in the blood, positive energy is resistant to the evil out, evil and positive competition, depression and heat, blood heat is hot, heat forced blood, damage to the blood channels, blood overflow outside the veins then purple spots. 2.Improper diet and insect bite: If you do not eat well or clean, if you eat too much fat, sweet, thick taste, or fishy seafood, or bad drugs, or if you are bitten by insects, it will lead to heat and poison, which will enter into the stomach and internal organs, and insect poison will enter the blood, which will spread the poisonous gas and force the blood to travel, and the purple spots will appear on the surface of the muscle. Excessive consumption of alcoholic wine and thick taste will breed dampness and heat, which will injure the veins and spleen and stomach and lead to deficiency of spleen and stomach and loss of blood control and purple spots. 3.Qi deficiency and lack of power of blood control: If the body is weak, or after a long illness, or after a long illness, or if the body is injured by labor and fatigue, the spleen is weak and the blood has no power of control, the blood has no support and does not follow the normal path, and the veins do not pass and overflow on the surface of the muscle, then purple spots will appear. People with deficient body fluids are disturbed by evil qi and burned fluids, which can lead to fluids deficiency and blood depletion, and if fluids do not carry blood and blood does not return to the meridian, blood stagnation will occur. 4. Yin deficiency and fire, burning the veins: Yin of liver and kidney, internal heat of deficiency fire, or misuse of dry medicine, burning the blood veins, blood overflowing the muscle surface will become purple spots; or the seven emotions of labor and depression, excessive anxiety, resulting in the loss of yin and blood, deficiency fire on the inflammation, burning the blood veins, purple spots. The spots are purple in color and dull. If the internal organs and meridians are not moistened by fluids, and blood stasis stagnates in them, it can also be seen as lumbago and abdominal pain. Secondary causes 1.Seven emotions, liver qi stagnation: seven emotions, labor and weariness, excessive worry, resulting in liver yin loss, so that liver qi is not comfortable, spleen qi stagnation leads to liver spleen qi stagnation, accumulation of months, by the qi and blood, vascular stasis, so that blood flow is not smooth, clotted into a lump is the accumulation; by the tunnel is not conducive, liver and spleen are not harmonious, liver does not collect blood, overflow in the skin is purple spots. 2, deficiency labor disease for a long time, blood stagnation and blood stasis: deficiency labor does not recover, blood does not work, spleen qi is weak, no power, blood has no support, does not follow the normal way, can cause purpura; qi and blood deficiency to kidney essence deficiency as the root, purpura after a long time; bleeding, has left the meridian and not discharged out of the body, if the knot and for stasis, blood stasis heat each other, blood stasis and can prevent the growth of new blood and the normal operation of qi and blood; gas does not turn essence, yin and blood deficiency, yin deficiency fire. Or for both yin and yang deficiency, blood loss of nourishment, long time is not healed, is the main deficiency, and see the standard real, often for the standard deficiency mixed each other. 3, improper treatment: Yang micro want to extinguish, mismanagement, kidney Yang weakening, fire does not warm the earth, the Yang is also deficient. Spleen qi loss, spleen and kidney yang failure, resulting in evil love blood paralysis or residual evil is not exhausted, blood stasis accumulation in the body, resulting in the internal growth of yin and cold, cold coagulation of blood, blood stasis does not work; spleen does not take in blood, blood has no gas unity, dispersion does not collect, stasis condensed in the skin, then purple spots dark color without luster, the disease is dangerous. 4.Blood dispersion is not collected, purple spots for a long time: patients with improper treatment or treatment is not thorough, purple spots for a long time, there is a bias towards Yang Sheng Yin deficiency. The essence does not transform the blood or is biased towards the deficiency of yin and yang, and the qi does not take in the blood. There are also cases that due to the deficiency of the essence, the real fire, phlegm and stagnation as the symptoms, which will damage the essence, the true yin is not enough, the wind and evil are felt, the internal blood is closed, the heat hurts the veins and the blood is forced to travel, the blood overflows to the skin and the purple spots are developed. If the onset of the disease is rapid and violent, the majority of the cases are marked by actuality, and warmth, dampness and fire, and evil toxins are commonly found, and the majority of them are warm.