Basophil percentage of 5.6 is not normal. It is on the high side. High basophils are common diseases, blood diseases, infectious diseases. 1. If you have chronic granulocytic leukemia, you may also have high monocytes and basophils, which can be treated with tyrosine kinase inhibitors, such as imatinib. 2. Infectious diseases, if you suffer from chickenpox or tuberculosis and other infectious diseases, you may also have high monocytes and basophils, and you need to use antiviral and anti-tuberculosis drugs for treatment in time, such as ribavirin or teicovirin and rifampicin. It is recommended to pay attention to the recent diet, focusing on light, do not eat too spicy or greasy food.