There are benign and malignant breast nodules. For benign breast nodules of 3mm, it does not matter, but for malignant breast nodules, it is important and requires early standardized treatment for the condition. 1. Benign breast nodules: In the case of perfect examination, it is clear that the breast nodules are benign, and the nodules may be benign diseases such as breast fibroma, breast lipoma, etc., which is not important. In most cases, asymptomatic people do not need treatment and regular follow-up is sufficient. If there is pain and other discomfort, surgical removal can be considered. 2. Malignant breast nodules: malignant nodules are usually unclear, hard and with poor mobility, which is important. Once malignant breast nodules are found, early comprehensive treatments such as surgery (e.g. modified radical mastectomy), radiotherapy and chemotherapy (e.g. doxorubicin, etc.) should be given to strive for a complete cure. It is recommended that the patient further improve the auxiliary examination to clarify the nature of breast nodules, the professional physician to give appropriate treatment for the condition, the drug has side effects and contraindications, so it needs to be used under the guidance of a professional physician.