The three most important indicators of routine blood tests are usually hemoglobin, white blood cells and platelets, and high levels of these indicators indicate the presence of certain abnormalities in the body. 1. High hemoglobin: Commonly found in hemoconcentration or chronic hypoxic diseases. It is usually due to severe diarrhea or heavy sweating that leads to blood concentration. Chronic hypoxic diseases include chronic obstructive pulmonary disease, congenital cyanotic heart disease and other diseases. When these conditions occur, they can lead to high hemoglobin. In addition, it can also be seen in true erythrocytosis. 2. High white blood cells: Commonly found in infections or hematologic disorders. Infections include bacterial infections and viral infections. Hematologic diseases include leukemia, lymphoma, and so on. When this kind of abnormality occurs in the organism, the routine blood test is obviously characterized by elevated white blood cells. 3. High platelets: commonly found in hematologic diseases, including myeloproliferative neoplasms, acute hemolysis, primary thrombocythemia, etc., which can lead to abnormal proliferation of platelets and cause high platelets. When the three important indicators of blood routine are high, it may suggest that there is blood concentration, and the patient should do the next examination and treatment under the guidance of the doctor.