Breast nodule with unclear border is not necessarily cancer, but may also be caused by breast tuberculosis, breast cyst, breast hyperplasia and other diseases. 1. Breast tuberculosis: If the patient suffers from breast tuberculosis, it is possible that the border of the breast is unclear. Breast tuberculosis is a chronic inflammation of breast tissue caused by tuberculosis bacillus, which appears as a single nodule in the early stage, and then forms several lumps in the later stage, and is accompanied by fever, night sweating (sweating abnormally after falling asleep, but stops after waking up) and other symptoms. 2. Breast cysts: Breast cysts are generally related to aging of the gland and destruction of the gland structure. In serious cases, it is recommended that the patient can undergo puncture and fluid extraction, surgical excision and other methods of treatment. 3. Breast Hyperplasia: Breast Hyperplasia is a kind of degenerative change of breast tissue proliferation, usually related to endocrine disorders, the symptoms are usually manifested as periodic breast pain, and lumps. Breast nodule border is not clear, but also consider breast trauma, inflammation of the breast and other causes, the specific circumstances also need to go to the hospital for relevant diagnosis and treatment, we recommend that patients identify the cause of the treatment as prescribed by the doctor.