Patient: Examination and laboratory tests: routine blood tests on January 24, 2013: leukocytes 3.6, other parameters normal, treatment: this phenomenon in 2010, then oral elm whitening tablets and Ricorun, the leukocytes reached 4.8, January 24, 2013 again, leukocytes 3.6, immediately oral elm whitening tablets and Ricorun, February 19, 2013 again, the leukocytes On February 19, 2013, the leukocytes were again at 4.7, and so on. History: I feel very tired and weak, and I often have purple o on my legs, and my white blood cell count increases when I take Diyu Whitening Tablets and Ricorun, but it gets low after I don’t take them for a while. I would like to know what is the cause? Is this condition serious? How to treat it? Bai Yusheng, Department of Hematology, Xinjiang Uygur Autonomous Region Hospital of Traditional Chinese Medicine, Xinjiang Uygur Autonomous Region Hospital of Traditional Chinese Medicine: Hello! Leukopenia can occur in many diseases and includes several causes: insufficient bone marrow production; excessive peripheral blood destruction; the influence of pharmacological factors (side effects); and also pseudo reduction. This is not a serious condition, but a decrease in white blood cells leading to an increased chance of infection. You should find out what the cause is before you can target treatment.