Are there exercises or other ways people can prevent varicose veins?
If there was anything that could be done by the patient to prevent spider veins, varicose veins, or visible reticular veins (large green veins that can appear in the skin), they would do it. They would know about how to prevent them. They would start in childhood with whatever that prevention may be, but there is no such thing.
Compression hose do not decrease the likelihood of developing any of these venous abnormalities. No exercises will help them, prevent them or cause them. In addition, there is no medication that can prevent or treat vein disorders.
In general, there is nothing to do to prevent, stop or cause spider veins or varicose veins.