Lower limb ulcers are very harmful in life (commonly known as old rotten legs), firstly, they affect life and work, and secondly, the treatment consumes more energy and costs more, so we should try to avoid the occurrence of lower limb ulcers. For patients, it is important to understand the causes of lower limb ulcers, so as to do a good job of prevention, thus reducing its incidence and improving the prognosis. What are the causes of lower extremity ulcers? The following is a brief introduction: venous ulcers: first of all, long-term standing people (chefs, hairdressers, teachers, etc.), or long-term sitting people (accountants, etc.) are prone to lower limb swelling, some foot back or ankle edema, while often feeling sore and fatigue in the lower limbs, followed by varicose veins in the lower limbs, tortuous into a mass. It causes ulcers in the lower limbs. The main pathology is that varicose veins of the lower extremities are followed by venous hypertension in the lower extremities, which in turn leads to deposition of fibrin around the subcutaneous capillaries, forming a diffusion barrier for oxygen and other nutrients, which is the main pathological basis of venous ulcers. At the same time, the reduced fibrinolytic activity of the blood also makes the ability to remove fibrin diminish, and under the combined effect of both, the nutritional condition of the skin deteriorates and eventually ulcers are formed, which we also call venous stasis ulcers. Arterial ulcers: Mainly due to insufficient blood supply to the arteries of the extremities, intermittent claudication of the lower extremities, coldness and numbness of the lower extremities occur due to insufficient blood supply to the arteries, and finally necrosis of the toes occurs. Ulcers caused by arteriosclerotic occlusive disease and thrombo-occlusive vasculitis are also classified in this category. The above two types of ulcers can also be intermingled and seen together. Other types of ulcers: The development of old rotten legs not only affects people’s normal life, but may also lead to serious consequences of amputation. Here let us know how to do a better job of prevention: 1. People who stand for a long time should pay attention to rest, appropriate activities of lower limbs elevated, if necessary, elastic stockings to prevent the occurrence of varicose veins. For the sedentary people should also pay attention to appropriate activities to prevent stagnant edema. 2.Smoking. Nicotine and other harmful substances in tobacco can make the small blood vessels at the end of the limbs undergo a long period of spasmodic contraction, causing a sharp reduction in the blood supply to the skin, muscles and nerve tissue. This effect on the lower extremity artery stenosis or occlusion of patients in addition to aggravate atherosclerosis, but also lead to severe ischemia of the limbs already undersupplied with blood. 3, diet, be light, avoid high sugar, high fat diet, reduce the intake of cholesterol. Effectively control blood pressure and blood sugar to prevent the occurrence of lower limb atherosclerosis and diabetic foot.