Breast ultrasound category 4b nodules refer to the score of benign and malignant degree of breast hyperplasia nodules under breast ultrasound, and there is a high possibility of malignancy for breast category 4b hyperplasia nodules, and only 30% of nodules are benign nodules, so when breast hyperplasia nodules are category 4b, surgical excision should be performed in time. If the nodule is benign, the mammogram should be reviewed regularly every 3-6 months to dynamically observe the changes of the nodule, and if it is still benign within 2 years, the review period can be extended to 6-12 months. In conclusion, although there is a high possibility of malignant breast 4B nodules, there is also the possibility of benign ones, so once you have a breast 4B nodule, don’t panic too much, you should actively cooperate with the specialist for treatment, which will not cause serious clinical consequences.