There is no one specific cause of spider veins, but there are several factors that have shown to contribute to their development. Risk factors include:
- Weight Gain
- Hereditary or family history
- Pregnancy
- Hormone changes
- Birth Control Pills
- A history of blood clots
- Weight
- Exposure to UV rays
- Crossing the legs for extended periods
- Standing for extended periods
- Trauma or impact, such as regular running or jogging