The breast tissue in the breast is made up of several lobules, which are connective tissues that are relatively tough, so when you touch a normal breast you can feel a uniform and elastic texture, but you cannot feel the presence of lobules. If you feel a hard lump or nodule, you are in an abnormal state. In general, priority is given to the possibility of breast enlargement. With changes in the menstrual cycle, some women may palpate tender hard lumps of varying size, flat or irregular, and may also be accompanied by mild swelling and pain, mainly due to abnormalities in female hormone production, which generally do not require treatment. However, if there are persistent hard lumps and pain, it is recommended to seek medical attention for targeted treatment. In addition, some common breast tumors can also be palpable lumps. For example, breast fibroadenoma is a hard lump with round shape, clear border, smooth and good mobility, which requires breast ultrasound, mammogram and, if necessary, mammogram biopsy. Breast cancer lumps usually have unclear borders, poor mobility, irregular shape, and are painless to touch. In this case, it is necessary to clarify the specific stage and the presence of metastasis in the whole body or other parts of the body, and to formulate a suitable plan, such as surgery, radiation therapy, molecular targeted therapy, etc. It is recommended that adult women should have annual physical checkups, and they can also perform self-examinations at home on a daily basis. If the presence of abnormal hard lumps in the breast is detected, it is recommended to pay attention to it early and actively seek medical attention for gradual screening and targeted treatment.