Varicose veins are veins in the legs, which are become larger and twisted. they are usually formed in legs and thigs.
The leg muscles tightly situate pressures in the deep veins during walking, carrying most of the blood back up the legs to the heart.
This results below the skin which can form varicose veins. All of these veins are one-way valves to ensure that the blood flows towards the heart. Failure of these valves permit blood to flow backwards down the veins and results in pressure and pain when standing. This redundant pressure leads to expansion of the veins so that they do not close properly. Blood then travels through the legs along these veins and causes varicose veins to develop. More pressure in these veins also results in the development of spider veins and discoloured areas which look like bruises.