There are hard things in the breast to consider the following conditions: the first is caused by breast hyperplasia, which can easily form hyperplastic nodules or hyperplastic sclerosis, and the patient will also have painful manifestations, which is also a benign disease that occurs in the breast tissue. The second is breast tumors, which are also very common, specifically including benign tumors as well as malignant tumors and benign tumors, commonly known as mammary fibroids. It is usually a single, isolated lesion with a smooth surface and a hard, tough texture that can be painful to touch, while malignant tumors are mainly breast cancers that appear as irregular lesions with irregular margins. Patients with inflammatory breast cancer may have hard lumps in the whole breast, with increased skin temperature and obvious edema changes, while patients with malignant breast tumors may also have nipple overflow and enlarged lymph nodes in the axillae of the breast. Patients with abnormal breast skin changes and breast malignant tumors should be diagnosed early and choose surgery in time.