- Occupations that involve a lot of standing, such as nurses, hair stylists, teachers, and factory workers
- Hormonal influences of pregnancy, puberty, and menopause
- The use of birth control pills
- Postmenopausal hormonal replacement
- A history of blood clots
- Conditions that cause increased pressure in the abdomen, such as tumors, constipation, and externally worn garments like girdles.
Spider veins, also referred to as roadmap veins, are very tiny superficial blood vessels that increase in size over time. Some people are more susceptible to spider veins, including women and those who have a blood relative with the condition. Although some spider vein suffers may mistakenly believe tanning can help mask their condition, However, excess sun exposure actually can cause spider veins. Harmful ultraviolet light breaks down collegen which composes the walls of spider veins and can cause thinning and spreading of the veins. A number of factors predispose a person to spider veins. These include: