The pain of Blood stasis is characterized by pain like pins and needles, refusing to be pressed and fixed at the place of pain, and severe pain at night. Causes of blood stasis include: bleeding in the body due to trauma, fall, etc., and failure to discharge or dissipate the menstrual blood in time; stagnation of qi and blood, resulting in stagnation of blood; stagnation of blood due to cold condensation and stagnation of blood, and stagnation of blood due to heat; blockage of veins by dampness, phlegm, and other evils, resulting in obstruction of blood transportation; weak qi and yang, resulting in weak promotion of the blood, which results in slow blood flow; and weak veins and blood, resulting in delayed blood flow. The obstruction of qi and blood flow, not through the pain, so the manifestation of stabbing pain, fixed, refusing to press, etc.; night yang qi internal storage, can not encourage the blood to run, the blood flow is slower, stasis blockage is worse, so the pain at night is very much. If there is pain and other discomforts, it is recommended to actively go to the regular hospital to avoid delaying the condition.