Causes of leukopenia: The most common cause is autoimmune leukopenia combined with hyperthyroidism, but we cannot exclude other hematologic diseases, etc. In addition, besides leukopenia, do you have any other blood cell reduction? Therefore, further examination is needed to exclude other causes of leukopenia. If the autoimmune leukopenia is combined with hyperthyroidism, the general leukocyte-boosting drugs such as lisdexamfetamine and salbutamol do not work well, if there is no contraindication, under the guidance of the doctor, you can consider short-term (1-2 weeks) treatment with prednisone in small doses, which is generally more effective.