what cause my veins on legs to hurt and then stop hurting and then hurts  again
For most people, it is a cosmetic issue, but for some people varicose veins may cause pain. In some cases serious complications, such as phlebitis (inflammation of the veins), skin ulcers, and blood clots, can happen. Veins move blood from your body to your heart. When the one-way valves in your veins get weak, they may allow blood to flow backward and pool in your veins. That causes your veins to get bigger. Varicose veins usually show up in the legs and feet, because standing and walking increases the pressure on these veins.