The normal value of human red blood cells is (4.0-5.5) × 1012/L for adult males and (3.5-5.0) × 1012/L for adult females. When the red blood cell count is consistently higher than normal, it is called erythrocytosis. There are many causes of erythrocyte increase, mainly including the following two aspects: First, the relative increase of erythrocytes: due to the loss of water in the body, blood concentration leads to a relative increase of erythrocytes, seen in severe vomiting and diarrhea, massive sweating, extensive burns, diabetic ketoacidosis.
Second, absolute increase in erythrocytes: the clinical term erythrocytosis, including two, one is secondary erythrocytosis, seen in cyanotic precordial disease, obstructive emphysema, pulmonary heart disease, newborns or those living in the plateau, as well as hepatocellular carcinoma, ovarian cancer fibroids or hydronephrosis. Another type of primary erythropoiesis is seen in clonal hematopoietic stem cell disorders, also known as true erythropoietic disorders, and erythropoietic disorders caused by mutations in the erythropoietin (EPO) receptor.
Severe erythropoiesis can increase the viscosity of the blood in the body and cause uncomfortable symptoms such as headache, dizziness, fatigue, etc. Severe to the occurrence of cerebral infarction and other embolic manifestations, should be promptly seen and receive a comprehensive diagnosis.
Therefore, there are many reasons that can lead to red blood cells in the body, but the specific cause needs to be combined with the patient’s medical history and other relevant laboratory tests to confirm the diagnosis.