A category 3 breast nodule is defined as a BI-RADS grade 3 nodule, which is more likely to be benign. The size of the nodule, 10mm x 16mm, alone does not determine whether it is benign or malignant, and the symptoms and morphology of the nodule need to be taken into account in determining the management of the nodule. Regular follow-up is sufficient for nodules with a high likelihood of being benign, while those suspected of being malignant may require surgical treatment. 1. Regular follow-up: For 10mmx16mm category 3 breast nodules, if the patient has no obvious abnormal symptoms, the nodule shape is regular, the edge is smooth and clearly demarcated from the surrounding tissues, surgery can be avoided. Regular follow-up can be done every 3-6 months to observe the changes of the nodule, if the proliferation rate is too fast, further examination is needed. 2. Surgery: If the shape of the breast nodule is irregular, hard and not clearly demarcated from the surrounding tissues, there is a possibility of malignant nodule, it is necessary to give surgical treatment and do pathological examination on the excised tissues, if it is benign, then it does not need further treatment; if it is a malignant tumor, then it needs to be further expanded with surgery, radiotherapy, chemotherapy (Doxorubicin, etc.) and other treatments. It is recommended that the patient should consult a doctor in time and complete all auxiliary examinations in order to clarify the condition, and then a professional doctor should give the corresponding treatment for the condition, and the drugs should be used under the guidance of a professional doctor.