Blood stasis is a term used in Chinese medicine, it can be a diagnosis or a disease mechanism, that is, the condition of blood stasis can be the result of other pathological causes on the one hand, and at the same time it is also the cause of the disease, how is blood stasis caused? In general, it is related to the operation of Qi in the human body, because Qi drives the operation of blood, so the common ones are Qi stagnation and blood stasis, and Qi deficiency. Qi stagnation and blood stasis is very common in people who are always depressed, stressed and easily angered, like this, their human qi does not work well, and over time will cause the pathology of blood stasis and blockage. Qi deficiency means that a person has no energy and the body is weak. If it is a simple Qi deficiency, over time the Qi does not have the ability to push the blood to run, that is, the blood lacks power, in this case there will also be stasis and blood stagnation, this is the most common clinical situation, this is also said to be the two simple cases. There are also more complex causes of Blood stasis, but these complex causes often affect the flow of Qi, which in turn causes Blood stasis. In what ways can Blood stasis be seen? In most cases, one can look at the tongue. When one sees a purple spot on the tongue, which is very dark, it indicates the presence of stasis of Blood, and in other cases, the presence of stasis of Blood on the face, with heavy dark spots on the face, also indicates the presence of the pathology of stasis of Blood, and there are various clinical means, but the more common ones can be judged by these two points.