There is a difference between breast fibroma and cancer. The difference mainly includes the difference in the nature of tumor, age of onset, clinical manifestation, and the source of both. Breast fibroma is a benign tumor, preferred in young women, with a high incidence age of 20-25 years old. Except for the lump, patients often have no obvious conscious symptoms. The lump grows slowly, is tough, has a smooth surface, can be pushed, and is painless. The menstrual cycle has no obvious effect on the size of the lump. Breast cancer is a malignant tumor. The cause of the disease is still unclear, the main manifestation of the disease side of the breast painless, single lump, lump hard, and the surrounding border is not clear, not easy to be pushed, with the development of time, will involve the surrounding ligaments, appear dimple sign, slowly will involve the surrounding lymph nodes, and even the occurrence of distant metastasis, should be detected early and early surgical treatment. Fibroma is a benign tumor originated from mesenchymal tissue and epithelial tissue, if malignant transformation occurs, it may lead to breast sarcoma, and a small portion of breast cancer, breast cancer is a malignant tumor originated from epithelial tissue. In short, both of them initially manifest as painless lumps in the breast. When patients find painless lumps in the breast, they should consult the regular hospitals in time to clarify their nature and under the guidance of doctors.