In life, bruising of the skin is often seen, so what are the symptoms that should be differentially diagnosed to easily occur bruising? Painful femoral cyanosis When iliac and femoral vein thrombosis extensively involves the intramuscular venous plexus, the lower extremity shows a high degree of edema because the iliac femoral vein and its lateral branches are all blocked by the thrombus. Due to the severe obstruction of venous return and severe bruising, the clinical manifestations are severe pain, cyanotic skin of the affected limb, often accompanied by arterial spasm, weakening or disappearance of arterial pulsation in the lower limb, and lowered skin temperature, which in turn leads to a high degree of circulatory disturbance and becomes an emergency state of DVT in the lower limb, with a large systemic reaction and a tendency to shock and wet gangrene of the lower limb. Femoral cyanosis Deep vein thrombosis refers to the abnormal coagulation of blood in the deep veins, which is a lower limb venous reflux disorder. The most common clinical manifestation is the sudden swelling of one lower limb, and if the femoral cyanosis is formed, the onset is rapid, the pain is severe, the lower limb is obviously swollen, the skin is cyanotic, the arterial pulsation of the foot disappears, and the systemic reaction is strong. Therefore, early postoperative bed activity or passive bed activity (limb massage, foot extension and flexion exercises, etc.) is one of the key means to prevent the occurrence of this disease, and once the lower limb deep vein thrombosis, postpartum cyanosis is the name of the disease. It refers to the bruising and swelling of the skin in a part of the body after delivery. The woman’s experience formula cloud, this blood water accumulation also. The main manifestation is the proliferation and infiltration of leukemia cells. The non-specific lesions are bleeding and tissue malnutrition and necrosis, secondary infection, etc. The proliferation and infiltration of leukemic cells occur mainly in the bone marrow and other hematopoietic tissues, but also in other tissues throughout the body, resulting in a significant reduction of normal red blood cells and megakaryocytes. The bone marrow may be grayish-red or yellowish-green in color due to markedly active or extremely active proliferation of certain leukemic cells. Lymphatic tissues may also be infiltrated by leukemic cells, and lymph nodes may be enlarged in later stages. Fifty to 80 percent of leukemic decedents have significant central nervous system leukemic changes. The common ones are intravascular leukocyte depression and perivascular leukocytosis. Other organs where leukemic infiltration most frequently occurs are the kidneys, lungs, heart and thymus, testes, etc. As can be seen from the above, leukemia infiltration of tissue organs is more concentrated and severe, with a greater capacity for tissue destruction. Most leukemias are associated with varying degrees of bleeding during the disease process, which can occur at any site, but mostly in hematopoietic tissues, skin mucosa, pericardium, spleen, stomach and central nervous system. Its bleeding often occurs on the basis of the presence of leukemic cell infiltration. Due to leukemic cell infiltration, bleeding, infarction and systemic metabolic disorders, local or all tissues may have malnutrition and atrophy, or even necrosis. In recent years, due to the application of a large number of chemotherapeutic drugs and antibiotics, the autopsy pathological changes have new manifestations, the disappearance of leukemic cell disintegration infiltration, the emergence of fibrin exudation, histiocyte phagocytosis, followed by fibrosis. Bone marrow may show atrophy or fibrosis, increased infection by certain mycobacteria and protozoa, and increased drug-induced lesions.