The normal range of absolute monocyte value is (0.12~0.8)×10⁹/L. The absolute monocyte value of 0.82×10⁹/L is slightly higher than the upper limit of the normal value, and it is considered to be a high probability of physiologic increase. In the following, the concepts, causes of physiologic increase, causes of pathologic increase and causes of decrease are described. 1. Monocyte is a kind of white blood cell, which is an important immune defense cell of the body and has strong phagocytic ability. 2. Physiological elevation of monocytes is usually seen in infants and children, and some adult patients such as drinking too little water may also have an increase in the absolute value of monocytes. 3. The absolute value of monocytes will increase when there is inflammation in the body or certain blood diseases. This can be seen in infectious diseases such as infective endocarditis, malaria, viral hepatitis, and hematologic diseases such as acute mononuclear cell leukemia and myelodysplastic syndromes. 4. Monocytopenia usually has no clinical significance, hairy cell leukemia patients will appear monocytopenia. Warm tips: the absolute value of monocytes 0.82 × 10⁹ / L is slightly higher than the upper limit of the normal range, considering the possibility of physiological increase. Drink a lot of water, and review if necessary.