Breast ultrasound has a classification for breast nodules, which indicates the chance of malignancy and prognosis. The 4A class of breast nodules is divided into A, B and C classes among the 4 classes of breast nodules, which indicate the chance of malignant tumors, respectively. If you are not sure, you can also do a breast biopsy, the pathological results are always the gold standard for diagnosing malignant tumors, so you can do a biopsy of the breast nodule to clarify the nature of the breast nodule before making a treatment plan. The actual fact is that you need to pay more attention in your life, eat light food, less spicy and stimulating food, to avoid further stimulation of breast nodule growth, you can exercise properly.