A varicose ulcer, or venous leg ulcer, is a chronic, slow-healing wound that develops on the lower leg, typically above the ankle. It's caused by chronic venous insufficiency, where damaged valves in leg veins lead to blood pooling and high pressure, damaging skin tissue.Symptoms include an open sore, swelling, leg pain/heaviness, and skin discoloration (brownish) around the ankle.Diagnosis involves physical examination and vascular ultrasound to assess vein function.Treatment primarily focuses on compression therapy (bandages/stockings) to improve blood flow, alongside regular wound care, leg elevation, and addressing underlying vein issues (e.g., vein procedures).Prevention involves managing venous insufficiency through compression, regular exercise, and avoiding prolonged standing or sitting.