Bilateral inguinal right iliac vessels slightly large lymph nodes belong to lymph node enlargement, may be lymphadenitis, lymphoma, malignant tumor metastasis and other reasons related. 1. Lymphadenitis: this disease is mainly caused by bacterial infection, commonly hemolytic streptococcus, staphylococcus aureus and so on, followed by fungal infection. In addition, infected lesions in other parts of the body are also common triggering factors for this disease. Patients will have lymph node enlargement, pain and other symptoms, which can be manifested as bilateral inguinal right iliac blood vessels slightly large lymph nodes. 2. Lymphoma: the etiology of this disease is still unclear, research shows that it may be related to bacterial or viral infection, or may be due to immunocompromise, heredity, smoking, radiation and so on. Patients will have painless progressive enlargement of lymph nodes, and some patients mainly show enlargement of lymph nodes in the groin. 3. Metastasis of malignant tumor: if the patient suffers from bladder cancer, rectal cancer, colon cancer, etc., when the condition develops further and the malignant tumor starts to metastasize, there will be bilateral inguinal right iliac blood vessels with slightly enlarged lymph nodes. It is suggested that patients with bilateral inguinal right iliac vessels slightly large lymph nodes should go to the hospital in time to clarify the specific causes.