Finger (toe) bone infarction is one of the symptoms of sickle cell anemia (crescentcellanaemia, sickle-cellanemia), which is a hereditary blood disorder and can also become a pure-hybrid sickle cell disease with clinical manifestations of varying degrees of hemolytic anemia and mild jaundice. Vascular occlusive crisis is its prominent manifestation, often with severe pain at the trunk and extremities, including visceral, bone, joint and muscle pain, especially metacarpal, epiphyseal and phalangeal (toe) infarcts are common, with infection, dehydration, hypoxia and acidosis as its triggers. Infection, dehydration, hypoxia and acidosis are the causes. Visceral and cerebrovascular infarcts show corresponding signs and symptoms. Tests required for finger (toe) bone infarction: 1. Hemoglobin electrophoresis The different isoelectric points of various hemoglobins are characterized by different positive and negative charges in a certain pH buffer, and the direction of movement of each hemoglobin is different after electrophoresis. The hemoglobin electrophoresis test is performed to confirm the presence of abnormal hemoglobin and the ratio of various hemoglobins. 2.Sickle cell: Sickle cell is shaped like a sickle. This is due to the presence of abnormal hemoglobin S in the red blood cells, and the body is prone to the formation of these red blood cells under hypoxic conditions. Therefore, to check for sickle cells, a wet film of blood is made and a reducing agent such as sodium metabisulfite is added. Sickle-shaped red blood cells are important for identifying the type of anemia. This is due to the presence of abnormal hemoglobin S in the red blood cells, which are prone to form in the body under hypoxic conditions. Positive: Hereditary sickle cell aplasia. Sickle cell disease, also known as sickle cell anemia, is a genetic disorder that causes the patient’s red blood cells to flatten or distort, thus changing the shape of the red blood cells to be sickle-like. 3.Blood routine Blood routine is the most general, basic blood test. Routine blood tests are usually taken from peripheral blood for examination, such as blood from the fingertip or earlobe area. After the blood cell analysis instrument, the computer reports the results, and this item has become a practice to examine patients. Blood consists of two major parts, liquid and tangible cells, and routine blood tests are performed on the cellular part of the blood. Blood has three different functions of cells – red blood cells (commonly known as red blood cells), white blood cells (commonly known as white blood cells), and platelets. Diseases are determined by observing changes in number and morphological distribution. It is one of the common auxiliary examinations used by doctors to diagnose the disease. 4, urine examination Urine examination includes urine color, transparency, acidity, red blood cells, white blood cells, epithelial cells, tubular type, protein, specific gravity and urine sugar characterization. Many kidney lesions can appear in the early stage of proteinuria or in the urine sediment with fractions. 5.Urinary routine urine is one of the “three routine” items of medical tests, many kidney lesions can appear in the early stage of protein urine or urine sediment formation. It is also an important reference value for the diagnosis of certain systemic diseases and diseases affecting urine changes in other organs of the body, such as diabetes, blood diseases, liver and biliary diseases, epidemic hemorrhagic fever, etc. At the same time, urinalysis can also reflect the treatment effect and prognosis of some diseases. Through this test, we can determine the corresponding signs of disease. Routine urine tests include urine color, clarity, pH, red blood cells, white blood cells, epithelial cells, tubular type, protein, specific gravity and urine sugar characterization.