Bilateral inguinal lymph node enlargement is mainly considered to be caused by abnormal physical conditions, and the causes of the corresponding conditions mainly include inflammation, immune system diseases and tumor lesions. 1. Inflammation: Pelvic inflammatory disease and adnexitis will induce the reaction of the neighboring lymphatic tissues, which will further lead to lymph node enlargement, and the corresponding lymph nodes will usually have pain and large activity. 2. Immune system diseases: immune system diseases, such as rheumatism and systemic lupus erythematosus, will cause lymph nodes to have immune reaction leading to enlargement, which will be affected by the activity of the disease. 3. Neoplastic lesions: the presence of pelvic malignant tumors, such as cervical cancer, rectal cancer, etc., may lead to bilateral inguinal lymph node metastasis, causing lymph node enlargement. When bilateral inguinal lymph nodes are found to be enlarged, it is necessary to consult a doctor in time for observation and standardized treatment after determining the cause of the disease.