Veins that appear twisted and bulging; they are often like cords on your legs

When painful signs and symptoms occur, they may include:
• An achy or heavy feeling in your legs
• Burning, throbbing, muscle cramping and swelling in your lower legs
• Worsened pain after sitting or standing for a long time
• Itching around one or more of your veins
• Skin discoloration around a varicose vein

Spider veins are similar to varicose veins, but they're smaller. Spider veins are found closer to the skin's surface and are often red or blue.
Spider veins occur on the legs, but can also be found on the face. They vary in size and often look like a spider's web

Causes

Weak or damaged valves can lead to varicose veins. Arteries carry blood from your heart to the rest of your tissues, and veins return blood from the rest of your body to your heart, so the blood can be recirculated. To return blood to your heart, the veins in your legs must work against gravity.
Muscle contractions in your lower legs act as pumps, and elastic vein walls help blood return to your heart. Tiny valves in your veins open as blood flows toward your heart then close to stop blood from flowing backward. If these valves are weak or damaged, blood can flow backward and pool in the vein, causing the veins to stretch or twist