In general conditions, when the breast ultrasound reports that the patient has a grade 3 nodule, the usual situation is not malignant disease, although it is necessary to repeat the examination in 3 to 6 months. Ultrasound BI-RADS classification refers to the presence of breast nodules that are automatically categorized by the ultrasound instrument in order to describe the condition of the nodules in patients undergoing breast ultrasound. The general ultrasound BI-RADS classification can be categorized into 7 classes, i.e., categories 0 to 6. Category 0 generally means that the results are unreliable and need to be re-examined. category 1 indicates that the nodule is a normal structure. categories 2 and 3 both refer to benign nodules, with the former being reviewed every six months to a year and the latter every three to six months. Categories 4 to 5 mostly refer to nodules that have varying degrees of likelihood of being malignant and require further examination, while category 6 indicates that the nodule is malignant. Ultrasound results need to be interpreted by a specialized breast surgeon.