A 7x3mm nodule at 8 o’clock in the breast is usually not serious if the imaging classification is low and the biopsy is benign, but more serious if the biopsy result is malignant. Breast nodules first need to be judged for risk of malignancy based on BI-RADS classification from ultrasound and mammography. Generally category 1 is normal tissue, category 2 is a benign nodule, category 3 has a <2% probability of malignancy, category 4 has a 2% to 95% likelihood of malignancy, and category 5 has a >95% likelihood of malignancy. Generally, category 2-3 nodules are benign and not serious, and can be treated symptomatically with regular follow-up. category 4 and 5 nodules have a certain risk of malignancy, and need to undergo further puncture biopsy to clarify the benignity or malignancy. If the result of puncture suggests that benign tumors such as fibroma and intraductal papilloma are not serious, they usually do not affect the survival and quality of life, and can be cured by lumpectomy or segmental resection. If the puncture result suggests malignant tumors such as breast cancer and breast sarcoma, they are more serious, and if not treated in time, distant metastasis may occur, which is life-threatening in serious cases, so they need to undergo radical surgery, chemotherapy, endocrine therapy and other comprehensive treatments as early as possible. It is recommended that the patient should consult the doctor in time and choose the appropriate treatment plan according to the comprehensive analysis of the imaging results.