A hard lump in the breast with pain can have various causes, and its management needs to be determined by the nature of the lump to determine the specific treatment plan. First of all, it is recommended to visit a hospital and perform breast ultrasound, mammography, and MRI to clarify the nature of the lump. Secondly, if the pain and lump change with menstruation, with the pain worsening during menstruation and relieving after menstruation, and the lump becomes softer, smaller or receding after menstruation, most consider mastopathy, which can be managed by taking Chinese herbs and proprietary Chinese medicines, which can be relieved in most patients. In addition, if the lump does not recede significantly, or if a tendency of malignant change is found during observation, a medical examination is recommended. In addition, if the lump appears with pain during breastfeeding, most of them consider milk stagnation combined with infection. Blood tests can be performed and the inflammation index will rise significantly, and some patients will have remission with anti-infection treatment, and if abscesses are formed they need to be incised and drained. Finally, malignant tumors of the breast can also cause pain in the middle and late stages, so it is recommended to clarify the nature and then decide the specific treatment.