Standing up or sitting down for long spells can cause the veins in your legs to bulge and become more visible, these are called varicose veins. It commonly affects the veins in the legs and feet since standing and walking upright increases the pressure in the veins of the lower body. Signs and symptoms of which may include veins appearing to be dark purple or blue in color, and appear twisted and bulging. Moreover, it may cause an achy or heavy feeling in your legs, muscle cramp in the lower legs, itching around the veins, worsened pain after long hours of sitting/standing, and skin ulcers near the ankles. According to research or other evidence, the following self-care steps may be helpful.