Breast nodules are not standardized, breast hyperplasia is a benign disease, and only rarely will cancer occur. If the breast nodules need to be combined with relevant examinations, personal situation, comprehensive analysis, can not be generalized. Usually, breast nodules are divided into 6 levels under ultrasound (BI-RADS classification). 0: ultrasound examination can not be used to fully evaluate the lesion, and need to be further diagnosed by other imaging tests; 1: negative results, no abnormal lesions found, and also the normal breast; 2: benign lesions, basically exclude the malignant, and can be regularly rechecked; 3: the probability of benign lesions, it is recommended that 3-6 months follow-up, 3: the malignant rate of the lesion is generally less than the rate of malignant lesions. Grade 4: malignant lesion, malignant rate 2%-95%; 4a need biopsy, but the malignant rate is low (3%-30%), if the biopsy benign results can be trusted, can be converted to six-month follow-up; 4b tends to be malignant, malignant rate may be in the range of 31%-60%; 4c further suspected to be malignant, the likelihood of 61%-94%; 5: highly likely to malignant, almost certain, the possibility of malignancy is greater than the Almost certain, malignancy probability is more than 95%; Grade 6: biopsy has been confirmed as malignant. The cancer rate varies according to different grades, but it is impossible to determine how many years a breast enlargement can become cancerous. In addition, mammary hyperplasia does not have nodules, and refers to a type of disease in which the ducts of the mammary glands are enlarged due to the increase of estrogen, and the disease is rarely malignant. Women should pay attention to their own breast health, regular self-examination, discomfort symptoms need to go to the breast surgery for examination, do not ignore the early discomfort symptoms, so as not to delay the condition.