Lymph nodes in the breast are usually caused by physiology, infection, and metastasis from breast tumors, and treatment varies by cause. They can be treated by taking roxithromycin, penicillin drip, surgery and other methods. 1. Lymph nodes caused by physiological factors will gradually become smaller and heal on their own, so they can be left untreated. 2. Breast lymph nodes caused by localized infections can be treated with oral erythromycin, which is anti-inflammatory and antibacterial and prevents the infection from worsening. If oral medication cannot control the condition well, intravenous drip of sensitive antibiotics such as penicillin should be used to control the infection. 3. Breast lymph nodes may also be caused by tumor metastasis. Pathological biopsy can be performed in the hospital to clarify the type of pathology, and surgery is required when necessary. If you have enlarged breast lymph nodes, you should consult a doctor in time to clarify the cause of the disease, and under the guidance of the doctor, professional treatment should be carried out. The medication should be prescribed by the doctor.