So, what causes spider or varicose veins? Here is something that you should know if ever you have these on your legs, thighs or calves. Veins in your system have valves that prevent the flood from flowing backwards as it moves up the legs. When a person has varicose veins, these valves become weak and it results in blood going away from the heart and leaking back into the vein and would stop there. And before you know it, your veins get enlarged and stretched out because of the collected blood and it becomes varicose. But what are the spider veins causes? People who are obese are prone to varicose veins. Athletes can also be “victims” of varicose veins and most of all, women who always wear high-heeled shoes and women who are pregnant are the most common “victims” of this health predicament. But whatever the reason there may be for varicose veins, they can always get help from this book guide called “Varicose Veins Guide” to educate them how to get rid of spider or varicose veins the natural and safe way, without the use of any forms of medications.