Purple blood vessels on the feet are a sign of mild varicose veins. The purple color of blood vessels on the feet is mostly formed by the dilation of tiny blood vessels and capillaries. The mechanism of occurrence is similar to that of varicose veins in that it is caused by poor venous reflux that results in dilated capillaries in the feet. The purple blood vessels on the feet usually have no clear symptoms, but with the further development of the disease, there can be the exposure of thicker branching vessels, commonly known as bruises, which are caused by varicose veins and poor venous reflux. Therefore, purple veins on the feet also need to be treated by patients according to the principles of varicose veins, and medical compression stockings can be worn to slow down their progress. If the symptoms worsen or tend to spread, it is necessary to visit the vascular surgery department of a regular hospital.