Elevated leukemia in the blood routine of anaphylactic purpura may be caused by bacterial infection, immune response and so on. It can be further examined to confirm the diagnosis and targeted treatment. 1. Bacterial infection: a part of the patients with allergic purpura is caused by bacterial infection, such as acute upper respiratory tract infection, tonsillitis, etc., and then appear the symptoms of allergic purpura, when the blood test, there can be high leukocytes. 2. Related to the immune response: Henoch purpura is a kind of allergic disease, antigen-antibody complex can lead to inflammation of the blood vessel wall, white blood cells are involved in the inflammatory reaction, so it leads to high white blood cells. Patients with purpura, the symptoms of high white blood cells, can be combined with other clinical symptoms to confirm the diagnosis, combined with bacterial infection, can be added with antibiotics (levofloxacin) treatment, the drug needs to be used under the guidance of a doctor, usually pay attention to rest, to avoid cold, so as not to affect the recovery of the disease.