Leukocyte is a general term for a group of cells in the blood, mainly including monocytes, lymphocytes, and neutrophils. The normal value of white blood cells is (4-10) x 109/L, and anything above this range is called leukocytosis. A high white blood cell count does not necessarily mean that you have leukaemia. High blood white blood cells are common in inflammatory infections, bleeding, poisoning, and severe burns. When they are particularly high, leukaemia is certainly not excluded.

　　Generally speaking, the symptoms of leukaemia are mainly anaemia and some related symptoms, such as: weakness, pallor, loss of appetite, weight loss, and so on. Easy to bruise or bleed, e.g. bleeding from the dental bed, nosebleed. Highly susceptible to infections, e.g., sore throat, bronchitis with headache, low-grade fever, sore mouth and skin rash. Enlarged lymph nodes, especially in the throat, armpits and groin. Feeling of discomfort under the left hypochondrium. In severe cases, there is a sudden onset of high fever, clouded consciousness, and inability to speak or move limbs. Further tests, such as bone marrow imaging, are needed to confirm the diagnosis of leukaemia. Leukaemia is a malignant clonal disease of haematopoietic stem cells.

　　Therefore, high blood leukocyte count does not necessarily mean that you have leukaemia. If you suspect that you have the above symptoms of leukaemia, it is best to go to the hospital for a comprehensive examination and a clear diagnosis of the disease before targeted treatment. If the white blood cells are elevated due to inflammation, sensitive antibacterial and anti-inflammatory drugs should be taken to actively treat the disease, and the white blood cells can be normalised after the inflammation is under control. Many physiological factors can cause an increase in the total number of white blood cells. For example: strenuous exercise; physical labour; prolonged exposure to cold air in winter; and a slight increase in white blood cell count after a full meal or shower, but these causes of white blood cell elevation do not require treatment.