Left iliac paravascular nodule may be caused by enlarged lymph nodes and vascular malformation. 1. Enlarged lymph nodes: Inflammatory reaction of lymph nodes caused by bacterial infection, etc., leading to abnormal growth of lymph nodes, usually accompanied by redness, swelling, pressure and pain, burning, etc., resulting in left iliac paravascular nodes. 2. Vascular malformation: lesions of angiogenic factors lead to abnormal proliferation of vascular endothelial cells, resulting in the appearance of lumps and masses, accompanied by pain, edema and other symptoms, resulting in left iliac paravascular nodes. Left iliac paravascular nodule, need to further relevant examination, clear cause, active treatment, and pay attention to warm measures, pay attention to light diet, avoid cold, spicy and greasy food, avoid excessive fatigue, pay attention to rest, ensure sufficient sleep.