This is a 70-year-old man, varicose veins for more than 30 years, slowly appeared black calf, itching, rash, can not help but to scratch, once picking a little skin, and gradually developed into a large area of ulcers, infection, bleeding water, a variety of prescriptions and a variety of dressings, tossing more than a year, not half better, and finally came to the vascular surgery, after surgery, drugs, pressure bandaging and other comprehensive treatment, changed the Finally, he came to the vascular surgery department, after surgery, medicine, pressure bandaging and other comprehensive treatment, and changed the medicine for more than a month, finally it was good. What is “rotten leg”? “Arterial diseases such as arteriosclerosis occlusion, thrombo-occlusive vasculitis, diabetic foot, etc., and venous ulcers are mostly seen in varicose veins and post-thrombotic syndrome of the deep veins of the lower limbs. Among all the lower limb ulcers, the proportion of ulcers caused by varicose veins is more than 70%, 20% are other venous diseases, and the remaining less than 10% are arterial diseases. In other words, most of the “old rotten legs” are related to varicose veins. How do venous ulcers develop? Venous ulcers are the result of venous stasis. The lower extremities are subjected to long-term venous hypertension from above, which leads to obstruction of blood flow back to the veins, resulting in stagnation and expansion of the veins, forming earthworm-like meandering coils, tissue stasis leading to skin malnutrition, swelling, blackening, rash, itching, and eventually developing into ulcers, which are often combined with infection and do not heal over time. In more serious cases, cancer may occur and a painful price may be paid. This shows that the presence of old rotten legs, just apply medicine is a cure for the symptoms but not the root cause of the problem, it is difficult to make it work. How is venous ulcer treated? Since the cause is clear, then the treatment plan is not difficult, we must treat both the symptoms and the root cause. Since it is caused by venous stasis and venous hypertension, the varicose veins and the refluxed traffic veins must first be treated surgically, together with oral medication, elevation of the limb, drug changes, pressure bandages and other comprehensive treatment methods, and give enough patience and cooperation, most of them can be completely cured. However, even if the ulcer is healed, the scar left behind can never be erased, so it is especially important to pay attention to the early treatment of varicose veins.