Multiple small lymph nodes in bilateral iliac vessels adjacent to abdominal veins in bilateral inguinal area mainly refers to the enlargement of lymph nodes in bilateral inguinal area. It is usually caused by chronic lymphadenitis, abdominal infection, malignant lymphoma and other diseases, if the patient has such symptoms, it is recommended to go to the hospital in a timely manner, improve the examination and then symptomatic treatment under the guidance of the doctor. 1. Chronic lymphadenitis: Chronic lymphadenitis is caused by bacterial, viral, tuberculosis or fungal infections, which usually leads to bilateral inguinal lymph node enlargement, lymph node tenderness, high fever and other symptoms. 2. Abdominal infection: abdominal infection refers to a series of abdominal infectious diseases, such as chronic peritonitis, intestinal schistosomiasis, chronic intestinal inflammation, etc., which can lead to enlargement of abdominal cavity, mesentery and bilateral iliac vessels, para-abdominal aorta lymph nodes. 3. Malignant tumor: lymphatic metastasis of malignant tumor and lymphoma can cause enlargement of iliac vessels, abdominal aorta and bilateral inguinal lymph nodes, which may not have any pain in the early stage, and nausea, vomiting, abdominal pain and inguinal lymph node enlargement can be found when the gastrointestinal tract is compressed. It is often found during abdominal examination. Therefore, the appearance of bilateral iliac vessels, abdominal aorta adjacent to bilateral inguinal area multiple small lymph nodes, it is recommended to consult a doctor in a timely manner, to identify the cause of the disease and actively treat it, so as not to delay the condition.