Enlarged axillary lymph nodes in breast hyperplasia nodules may be related to lymphoma, breast cancer, plasma cell mastitis and so on. 1. Lymphoma: breast hyperplasia nodules usually do not cause axillary lymph node enlargement, breast hyperplasia nodules, axillary lymph node enlargement, may be the emergence of lymphoma, lymphoma is mostly characterized by painless lymph node enlargement, manifested as a painless huge swelling, and persistent, the patient appeared to have fever, emaciation, night sweats (sweating abnormally after going to sleep, and waking up sweating stops). 2. Breast cancer: it is due to the uncontrolled appearance of breast epithelial cells and malignant changes. When lymph node metastasis occurs in breast cancer, the phenomenon of axillary lymph node enlargement will appear. Axillary lymph node enlargement is also a common site of early metastasis of breast cancer, and the lymph nodes are usually hard, painless, and can be pushed. 3. Plasma cell mastitis: also known as ductal dilatation of the breast, is a longer course, complex and diversified breast lesions, patients may appear nipple discharge, lumps under the areola, plasma cell mastitis, inflammatory reaction will appear axillary lymph node enlargement, accompanied by local pain and fever phenomenon. In addition, lymphadenitis may also appear similar clinical manifestations, the appearance of breast hyperplasia nodules, axillary lymph node enlargement, should promptly consult a doctor to identify the cause of the disease, symptomatic treatment.