As all of our patients know, 80% of varicose veins in the lower extremities do not require surgery, and only a small percentage of varicose vein patients require surgery. Varicose veins are not a serious disease, and in most cases, they do not significantly affect exercise or work, but if left unchecked, they can cause some dangerous situations. Mild varicose veins do not require much stress, while severe varicose veins need to be taken seriously and even treated surgically. So, what is a severe varicose vein? How can patients themselves determine the severity of varicose veins? Now, I will tell you two “danger signs” of varicose veins: 1. Mild varicose veins are generally painless, or only appear sore and heavy after exertion, and can be relieved by elevating the leg and resting. In severe varicose veins, there will be continuous and severe pain in the varicose veins of the lower limbs, and the more you move, the worse it gets, which means that the blood stagnation in the veins has become serious. This condition is more dangerous and requires rest and hospital consultation as soon as possible, preferably surgical treatment. 2. Itching of the skin. When itching of the skin occurs in the area of the varicose veins of the lower leg, in some cases accompanied by a change in the color of the skin, it also means that the varicose veins are aggravated. Let me explain the principle: all the symptoms of varicose veins in lower limbs originate from one factor – the stagnation of blood flow in veins of lower limbs. After the cells are broken down, they need to rely on venous blood to transport them away. When the lower limb vein stagnation to a serious degree, the old cells can not be transported away, crowded space, fresh arterial blood can not be transported in, the skin can not get fresh nutrients, it can not carry out the normal new metabolism, that is, “the old does not go, the new does not come”, over time, the skin nutrition becomes poor, there will be discoloration and itching, this situation Once an ulcer occurs, it is difficult to heal the ulcer due to the lack of skin nutrition, and it becomes a chronic ulcer, which is commonly known as “old rotten leg” or “polycarbonate leg”, which is very painful and tricky to treat. It is very painful and difficult to treat. In order to avoid the above situation, please pay attention to the “pain” and “itching” two red flags, once appear, promptly seek medical attention, may need surgery, before the disease continues to develop.