The inguinal area is the area where the lymph nodes on the surface of the body are distributed more and more densely, and the enlarged lymph nodes in this area can be seen in acute and chronic lymphadenitis, tuberculous lymphadenitis, malignant lymphoma and other diseases. 1. Acute and chronic lymphadenitis: patients with infections in lower limbs, buttocks and perineum will have enlarged inguinal lymph nodes on the same side, which may have pain and pressure, and the lymphadenitis may gradually subside after the elimination of the infection at the primary lesion. 2. Tuberculosis lymphadenitis: Mycobacterium tuberculosis invades the inguinal lymph nodes, and in addition to the enlargement of these lymph nodes, generalized tuberculosis toxicity symptoms such as low-grade fever, malaise, night sweats (sweating abnormally after going to sleep, and sweating stops after waking up), and emaciation can also occur. 3. Malignant tumors or lymphomas: malignant tumors or lymphomas in the lower limbs, perineum, pelvis, etc. can lead to inguinal lymph node enlargement, which are painless, hard and easy to be fused. If you find swollen inguinal lymph nodes, you should consult a doctor for a clear diagnosis and treatment under the doctor’s guidance.