The inguinal lymph nodes mainly collect some lymph from the lower extremities. The inguinal lymph is divided into two lymph node clusters: superficial and deep inguinal lymph nodes, of which the superficial inguinal lymph nodes are located below the inguinal ligament and are divided into two groups: upper and lower. The lower cluster is distributed along the end of the great saphenous vein and mainly organizes the lateral edge of the foot, the posterior lateral aspect of the lower leg and the superficial lymphatic vessels of the lower extremity. The superior group, which runs parallel to the inguinal ligament, mainly drains lymph from the anterolateral abdominal wall, buttocks, perineum, and uterus. The deep inguinal lymph nodes are the deep popliteal lymph nodes of the lower extremities and the output lymphatics of the superficial inguinal lymph nodes, which are located in the bony canal around the femoral vein and mainly inject the external iliac lymph nodes.