Getting cold: This is an initial signal, starting with just the tip of the foot, slowly progressing upward, once winter, even if you wear more and more thick, the feet are always cold, lying under the covers at night also overnight cool …… When you find this type of situation, you need to pay attention to it. Especially now that the quality of life has improved, high-fat, high-protein diet, and less activity, once you get older, more or less have different degrees of atherosclerosis, the light does not affect life, work, serious may appear heart, cerebrovascular accidents and ischemic diseases of the extremities, these lower limb ischemia, necrosis and even amputation of the disease, often started by the cold feet. Numbness: It usually appears slowly after the onset of coldness. The feet and hands are predominant, and the skin appears normal, while it feels different to touch, as if it is separated by a layer of clothing. It is not sensitive to cold or heat, and the water used to wash the feet is hotter than others. Especially for people with diabetes, because of ischemia or peripheral neuropathy, the foot lacks nutrition and blood supply. If left untreated, it is likely to cause untreatable ulcers, infections and even necrosis due to careless bruises and burns. Pain: When you progress to this point, it means that the danger is imminent. At the beginning, you may only experience soreness and pain in your calves when walking or running for long periods of time, which can usually be relieved by resting for a few minutes on your own. But as the disease progresses, the amount of time you can keep walking each time gets shorter and shorter, and the distance you can walk gets closer and closer. Eventually, when sleeping at night, there will be sleepiness and pain, which requires dropping the limb to relieve, and some people even sit with their feet in their arms all night long, unable to sleep. At this time, the ischemia of the lower limb is already very serious, accepting the edge of necrosis and amputation. If you do not get timely and effective treatment, you may end up with limb necrosis, which is life-threatening. All of the above are some common vascular health danger signals. When you find these signals, don’t hold on to the mentality of trying to harden yourself. After all, you only live once, and any disease, especially vascular disease, can greatly shorten the journey of life. Early examination in specialized vascular surgery to understand the degree of ischemia and narrowing of blood vessels can effectively save your limbs at an early stage, so that you can walk on your own legs in a healthy way.