11 doctors weighed in:
What causes varicose and spider veins?
11 doctors weighed in

Dr. Ted King
Phlebology
6 doctors agree
In brief: Heredity
Far and away, the major cause of varicose and spider veins is heredity.
Other factors can contribute to their development if you have inherited a tendency to get varicose veins in the first place. These include prolonged standing, age, pregnancy, hormones, and trauma. Surprisingly, obesity has not been shown to be a cause of varicose veins. It does increase the risk of complications though.

In brief: Heredity
Far and away, the major cause of varicose and spider veins is heredity.
Other factors can contribute to their development if you have inherited a tendency to get varicose veins in the first place. These include prolonged standing, age, pregnancy, hormones, and trauma. Surprisingly, obesity has not been shown to be a cause of varicose veins. It does increase the risk of complications though.
Dr. Ted King
Dr. Ted King
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Dr. John Landi
Phlebology
1 doctor agrees
In brief: Many factors.
Varicose veins are usually due to leaking(refluxing) vein valves.
Spider veins could be due to this as well but hereditary plays a key role. Factors that would increase your risk of developing either type of vein would be pregnancies in females and the greater the number, the greater the risk, hereditary, increasing age, hormones, standing or sitting in place and sometimes localized trauma.

In brief: Many factors.
Varicose veins are usually due to leaking(refluxing) vein valves.
Spider veins could be due to this as well but hereditary plays a key role. Factors that would increase your risk of developing either type of vein would be pregnancies in females and the greater the number, the greater the risk, hereditary, increasing age, hormones, standing or sitting in place and sometimes localized trauma.
Dr. John Landi
Dr. John Landi
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Dr. Michael Korona
Radiology - Interventional
1 doctor agrees
In brief: Bad valves in veins
See womenshealth.
Gov under varicose veins for good info.

In brief: Bad valves in veins
See womenshealth.
Gov under varicose veins for good info.
Dr. Michael Korona
Dr. Michael Korona
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Dr. Joel Gotvald
Surgery - Vascular
In brief: Genetics & Leg Veins
Spider veins & varicose veins are typically inherited as a genetic familial condition.
Underlying vein valve weakness & vein wall abnormalities are to blame. Others factors that can accelerate the process are pregnancies, prolonged standing occupations, & trauma. Female gender & increased aging also have increased incidence. Varicose veins are more serious & should be assessed by vascular surgeon.

In brief: Genetics & Leg Veins
Spider veins & varicose veins are typically inherited as a genetic familial condition.
Underlying vein valve weakness & vein wall abnormalities are to blame. Others factors that can accelerate the process are pregnancies, prolonged standing occupations, & trauma. Female gender & increased aging also have increased incidence. Varicose veins are more serious & should be assessed by vascular surgeon.
Dr. Joel Gotvald
Dr. Joel Gotvald
Thank
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