Whether or not it is normal to have 7.3 x 10^12/L red blood cells in the blood needs to be determined by the population being tested, and the value of red blood cells varies from one population to another. If it is a newborn, it may be normal, if it is an adult male or adult female red blood cells, it is abnormal. 1. Newborns have relatively high red blood cell values, with a red blood cell count of about (5.0 to 7.0) x 10^12/L at birth, while the normal range of red blood cells for adult males is (4.0 to 5.5) x 10^12/L, and for adult females is (3.5 to 5.0) x 10^12/L. 2. 7.3 x 10^12/L of red blood cells is considered erythrocytosis in all populations except newborns. 3. If the number of erythrocytes is increased, there will be increased blood viscosity, which will induce thrombophilia. You can eat a light diet, drink plenty of water, and reduce the number of erythrocytes by taking medications such as hydroxyurea. If the value of red blood cells is repeatedly tested and increased, it is recommended to consult a doctor in time, and then take appropriate treatment under the guidance of the doctor.