Lentigo is chronic myeloid leukemia. A CML fusion gene of 0.07 does not mean that the patient has turned negative. Normally, the fusion gene of chronic myeloid leukemia needs to be lower than 0.001 in order to reach the standard of conversion. 0.07 is positive, which means that the patient’s disease still exists or there is a risk of recurrence of the disease, and the patient should continue to be treated so as not to miss the best time for treatment. Patients need to actively cooperate with the doctor’s treatment. Strictly follow the doctor’s instructions to use drugs, can achieve good therapeutic effect, remember not to arbitrarily stop or change the dosage of drugs, otherwise it will lead to the condition can not be controlled, accelerate the deterioration of the disease. Patients with chronic granulocytes who have turned negative after treatment may still regain their positive status if they do not pay attention at a later stage, or even enter the acute phase without accelerated phase. Specific treatment drugs include imatinib, dasatinib and so on. Patients with chronic myeloid leukemia need to observe carefully, review regularly, adjust the treatment plan according to the results of the examination, communicate actively with the attending physician, and if there is any discomfort, it is recommended to go to a regular hospital for treatment immediately.