The normal white blood cells are 4000-10,000. If the white blood cells are higher than 20,000, it is a more serious infection. In this case, a blood smear must be examined to see the ratio of the various types of white blood cells in the blood and whether there are any abnormal cells. In addition to the blood smear, a bone marrow smear and bone marrow biopsy are also needed to see if there are any blood disorders. For example, leukemia bone marrow fibrosis, etc. Also be sure to rule out the possibility that it is a serious infection and need to do a blood culture test. For example, if there are more than 20,000 white blood cells, it is important to see if there are any serious infections. For example, coughing, coughing, abdominal pain, diarrhea or urinary tract infection symptoms. If there is, be sure to give symptomatic treatment along with the application of antibiotics. Be sure to drink more water during treatment, maintain good habits, do not eat spicy and sour foods, and do not stay up late at night, as this condition should help recovery. When the white blood cells are more than 20,000, you need to check a blood routine every day to review whether there is any change in the white blood cell situation.