The causes of recurrent fever and thrombocytopenia include aplastic anemia, leukemia, infectious diseases, etc. Detailed examination should be carried out in time in order to clarify the causes. 1. Aplastic anemia: Aplastic anemia is mainly manifested by infection and bleeding, patients will have recurrent fever and thrombocytopenia, which may also be accompanied by anemia. 2. Leukemia: about half of the leukemia patients may have recurrent fever, which may reach 39~40℃ or above; due to the proliferation of abnormal cells in the bone marrow, the normal hematopoietic function will be affected, and the number of platelets will be relatively reduced. 3. Infectious diseases: when the body is attacked by pathogens, it may lead to thrombocytopenia; if the anti-infective treatment is not carried out in time, the symptoms of recurrent fever may also appear. Repeated fever thrombocytopenia, must pay attention to, as soon as possible to identify the causes, and actively carry out treatment, in order to reduce the harm to the body.