We found in the blood cupping that the color of the blood varies, the amount varies, and water gas can appear at the mouth of the jar wall, or even lead to water, and after starting the jar, the area can appear dark purple, blistered, etc. What does all this mean? In fact, in the Ling Shu Jing, “Blood Loop Theory XXXIX” contains: “Huang Di said: stabbing the blood loop and the servant, why? Blood out and shot, what is also? Blood less black and cloudy, why? Blood out of the clear and half for the juice, what is also? What is the person who has a needle and swollen? If the blood comes out more or less and the face is pale, what is it? If the face is unchanged and happy, what is it? What about those who bleed a lot and do not move? I would like to hear the reason. Qibo said: the pulse is strong and blood deficiency, the stabbing is off gas, off gas is servant. Blood gas both Sheng and yin gas, the blood is slippery, the stab is shot; Yang animal accumulation, long rich and diarrhea, the blood is black to turbid, so can not shoot. The new drink and liquid seepage in the complex; and not yet combined and in the blood, so the blood out and the juice is not; its not new drink, the body in the water, for a long time is swelling. Yin Qi accumulates in Yang, and its Qi is due to the luo, so it is pricked, and the blood is not yet out but the Qi is first, so it is swollen. Yin and yang qi, their new each other and not yet harmonized, so diarrhea, by the yin and yang both off, the surface and the inside of the separation, so off color and pale. Prick of blood out of more, the color does not change and annoying tax, prick the complex and deficiency of the meridian, deficiency of the meridian belongs to the Ming, Yin off, so annoying. Yin and Yang get together for paralysis, this is the internal overflow in the meridian, external injection in the luo, such as this, Yin and Yang have surplus, although more bleeding and can not be deficient.” It can be interpreted as 1. Patients with blood deficiency are prone to syncope; 2. Those with a strong qi and blood are prone to blood shooting; 3. Those with stasis of blood for a long time and heat, the blood is black and dirty; 4. With new drinking, the blood comes out with watery fluid; 5. With long drinking disease, there is fluid in the body and local blisters are prone to appear; 6. Watery evil is on the surface of the body and pricking the blood may cause local edema. Clinically, it is true that 1, the patient is strong, the blood out more and faster; 2, blood black and solidified, mostly blood stasis heavy and host to heat, the skin is purple and dark after starting the jar; 3, the body has water or too cold and wet, the jar mouth jar wall appears water or liquid beads or bubbles at the eye of the needle; 4, if there is fluid (mostly malignant fluid), no matter where the blood cupping can be seen in the water and blood layering phenomenon or simply lead to cool liquid, in the chest wall Blood cupping is very easy to leave blisters; 5, subcutaneous edema of the extremities and chest and back, prick blood cupping is easy to appear after the treatment of local obvious edema; 6, more bleeding and disturbed because the needle injury and meridians (arteries or veins), rather than injury to the superficial capillaries; 7, at the same time found that weak people are prone to fainting, prick blood cupping for such groups of people should be cautious.