Varicose veins or the varicose veins are white blood cells that can develop on the upper surface of the leg. The most common cause of varicose veins is infection with varicella-zoster. Varicose veins and their treatment, in addition to varicose vains, includes other conditions and treatments like the following: Carcinogenesis of the veins is very uncommon and will not affect long-term survival. The effects of varicose veins may be more pronounced at night or when the person is at a high risk of infection. Varicose veins can become enlarged when varicella-zoster is active, so an infection with varicella-zoster is not a good cause for varicose veins. The first time varicose veins appear, they usually are small. The veins can be enlarged, and the veins may become twisted or appear twisted at the edges. The vein may become swollen and red. Vasculature that grows in a vein is not considered cancer, although tumors and other changes in the vasculature may have cancer-related characteristics. In addition, varicose veins that become large enough to affect life expectancy are not considered cancer and do not have to be removed surgically. This means that a doctor who removes a varicose vein can return it to the body at any time.