When a foot injury causes a localized infection, the inflammatory factor may cause ipsilateral inguinal lymph node enlargement. Inflammatory factors may cause inguinal lymph node enlargement. Inflammatory factors are most commonly associated with local inflammatory reactions and tumor metastasis. In most cases, the inflammatory response to a foot injury is limited to the site of injury, and the inflammatory factors may be diluted and eliminated by the blood or primary lymph nodes before they reach the inguinal lymph nodes. Therefore, foot injuries do not normally cause inguinal lymph node enlargement. When the injured foot is exposed to external infectious factors, it may cause localized infection of the wound, and when the infection is severe, the inflammatory factors may go up to the inguinal lymph nodes, resulting in lymph node enlargement. Therefore, when a foot injury is combined with inguinal lymph node enlargement, you should consult a doctor as soon as possible to clarify your condition.