Breast solid nodules are classified as category 3, which is an assessment of the degree of benignity and malignancy of breast nodules found by breast imaging. category 3 is considered more likely to be a benign tumor, and the probability of malignancy is less than 2%. Short-term follow-up can be done. Ultrasound examination can be done once every 3-6 months. If there are suspicious cases or psychological pressure is high, try to choose surgery. If the nodule is small, you can choose minimally invasive surgery to remove the nodule and send it for pathological examination, or do needle aspiration biopsy. If the nodules are large and need to be removed by incision, these solid nodules are more commonly known as breast fibroadenoma, with clear and smooth borders to touch, good mobility, up and down, left and right movement, and slow growth with no obvious changes on ultrasound. In addition, complex or clustered cysts also belong to this type, try to closely observe.