Blood is a viscous fluid flowing in the blood vessels and is divided into liquid component and formed fraction. The liquid component refers to blood plasma (50-60%) and the tangible component refers to blood cells (40-50%). Primitive blood cells are produced from the fetal stage onwards, and after birth the bone marrow becomes the only blood-forming organ. Blood cells mainly refer to red blood cells, white blood cells, platelets, and various immune cells. Red blood cells mainly transport oxygen and carbon dioxide and buffer the acid-base balance of the body. Leukocytes, on the other hand, are the first line of defense in the inflammatory response, gathering and traveling to the site of inflammation for phagocytosis. In contrast, the body’s monocyte-macrophage system is relied upon for larger bacteria, parasites, etc. Platelets are involved in the processes of blood clotting, anticoagulation and fibrinolysis in the body. Each cell in the blood does its own job and works together to keep the blood system in a normal dynamic and stable state. Common tests for blood disorders include: routine blood tests, morphological examination of blood cells, leukocyte classification, bone marrow cell analysis, chemical staining of blood cells, karyotype examination, immunological examination, pathological biopsy of bone marrow, relevant enzymatic tests and so on. The diagnosis of tibial pressure pain can be easily made through the relevant tests.