Even people who are genetically predisposed to spider veins can reduce the risk with the following measures:
Exercise regularly and best do activities that train the calves, such as hiking, dancing, jogging, walking, swimming, etc
Reduce excess body weight
Avoid standing or sitting for a prolonged period of time as much as possible or change the position at least every half hour
Avoid excessive alcohol consumption
Avoid nicotine
Stick to wearing flat shoes and put on high heels on special occasions only