If blood flow signals are seen in the patient’s lymph nodes, consider the presence of an infectious or neoplastic lesion. If blood flow signals are seen in the lymph nodes, it means that the lymph nodes have abundant blood flow and the lymph nodes are metabolically active. This suggests that the patient may be suffering from inflammation, which can accelerate blood circulation and lead to significant enlargement of the lymph nodes. This condition is treated by using antibiotic drugs such as cefixime capsules, amoxicillin, and levofloxacin. If the lymph nodes are enriched with blood due to tumor lesions, we can perform lymph node biopsy to clarify the cause of the disease, perform surgery for the primary tumor, and clear the relevant lymph nodes, and then follow up anti-tumor therapy with radiotherapy and chemotherapy as prescribed by the doctor. It is recommended that patients who find blood flow signals in lymph nodes during examination should consult the doctor in time, and actively treat the disease under the guidance of professional doctors after confirmation of diagnosis.