If your child has fever three times a month, it may be caused by congenital poor health, respiratory tract infection, leukemia, and so on. 1. Poor congenital constitution: If the child’s congenital constitution is poor, the body’s resistance is not enough to fight against viruses and bacteria, or there is anemia, etc., frequent fever may occur. 2. Respiratory infections: common respiratory diseases include bronchitis, pneumonia, etc. When the patient has a respiratory infection, it may cause recurrent fever, cough, chest tightness and other symptoms. 3. Leukemia: leukemia is a kind of malignant clonal disease of hematopoietic stem progenitor cells, due to the accumulation of large number of cancer cells, which inhibits normal hematopoiesis and infiltrates other organs and tissues, and may affect the resistance of the patients, and there are different degrees of anemia, hemorrhage, fever, and enlarged liver, spleen, and lymph nodes, etc. The child’s fever three times a month may be caused by leukemia. The child’s fever three times a month, there may also be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.