Enlarged inguinal lymph nodes may be caused by chronic lymphadenitis, tuberculous lymphadenitis, metastasis of malignant tumors and so on. 1. Chronic lymphadenitis: most patients have obvious foci of infection, manifested by inguinal lymph node enlargement, pain and tenderness, which will usually shrink after active treatment. 2. Tuberculous lymphadenitis: clinical manifestations of inguinal lymph node enlargement, may also be accompanied by fever and sweating, drowsiness, rapid blood sedimentation and other symptoms, mostly in young adults. 3. Metastasis of malignant tumor: if it is caused by metastasis of malignant tumor in other places, it is necessary to do further CT and MRI examination of chest, abdomen and pelvis to make a clear diagnosis. In the case of inguinal lymph node enlargement, you should consult the doctor in time, improve the examination under the guidance of the doctor to clarify the diagnosis and carry out targeted treatment.