Varicose veins harm, as follows: 1, varicose veins can lead to thrombophlebitis, local manifestation of local redness, swelling, pain, the patient will be severe pain. The vast majority of patients will not be painful, if combined with pain in the calf, may be combined with thrombosis, at this time if not intervene, because there is blood hypercoagulation when the thrombus, itself varicose veins are tortuous vessels, thrombus will continue to spread, can lead to the blood vessels have been out of shape, spread to the deep veins, especially the development of floating thrombus, thrombus off, leading to the most serious complications of pulmonary embolism, can be life-threatening; 2, varicose veins combined with Thrombophlebitis, which spreads to deep vein thrombosis, may require three surgeries: to prevent the occurrence of pulmonary embolism, the vena cava filter is routinely put down, and the filter is removed after doing varicose vein surgery, which increases many costs and adds burden to the patient. So early diagnosis and early treatment are needed when combined with thrombosis.