If the breast nodule grade 3 is benign, it is mild and requires regular review. If the breast nodule is malignant, it is more serious and requires surgical treatment and medication. Breast nodule grade 3 in the breast imaging report and data system represents the possibility of benign breast lesions is relatively high, but the breast nodule may also be malignant, but the chance of malignant transformation <2%, so breast nodule grade 3 is serious or not need to be judged according to the nature of the breast nodule. If the breast nodule grade 3 is a benign nodule, it is a mild lesion. If the patient’s breast nodule grade 3 is benign, the patient needs to go to the hospital every 3 months or 6 months for ultrasound to clarify the changes in the breast nodule. If a grade 3 breast nodule becomes malignant, it is a more serious condition. In this case, surgery is needed to remove the lesion, and chemotherapy drugs such as cisplatin and paclitaxel should be used as prescribed by the doctor. Whether a grade 3 breast nodule is serious or mild requires the patient to seek medical attention, and the doctor will determine the severity of the condition based on the nature of the breast nodule.