Color ultrasound examination of lymph nodes, mainly because the color ultrasound can observe the hemodynamics, size and morphology of the lymph nodes to determine whether there is lymph node enlargement. If the ultrasound does not indicate the presence of enlarged lymph nodes, they are not considered to be enlarged and should be monitored and reviewed regularly. If the ultrasound examination confirms that the lymph nodes are enlarged, and the lymph nodes are clearly demarcated from the surrounding tissues, it is generally considered to be a benign enlargement, and blood tests should be completed to identify whether the enlargement is caused by acute inflammation, such as pharyngitis, tonsillitis, etc., or by lymph node tuberculosis, or systemic lupus erythematosus, etc. If the swelling is painless, then it is not considered to be a lymph node swelling. If the swelling is painless, but the ultrasound shows that the lymphatic division is unclear, biopsy can be performed under ultrasound localization and sent to pathology to determine the nature of the lymph nodes. After the discovery of enlarged lymph nodes, you should promptly seek medical attention, improve the examination under the guidance of the doctor, clarify the cause of the disease, and timely treatment.