Hard lumps found in women’s breasts are a relatively common symptom, generally common in cases such as breast tumors and cystic hyperplasia of the breast. The incidence of breast tumors in women is very high. Benign tumors are more frequent with fibroadenomas, which arise due to the abnormally high sensitivity of fibroblasts in the lobules to estrogen, with a smooth surface and good mobility, slow growth, and surgery is the only treatment. Benign tumors can also be seen as intraductal papillomas. Breast cancer is one of the most common malignant tumors in women. Clinical manifestations mainly consist of a single painless lump in the breast with poor mobility, a hard lump and a non-smooth surface, which requires early detection and early surgical treatment. The main feature of cystic hyperplasia of the breast is breast swelling and pain, and the lumps can be cyclical in nature related to the menstrual cycle. Plasmacytoid mastitis can also be found as a lump around the areola with indistinct borders. Localized lumps due to breast tuberculosis also need to be ruled out, so the discovery of a hard lump in the breast should be promptly seen in the hospital.