If those valves leak, or a vein experiences too much pressure, the backflow of blood can stretch and twist the vein, leaving you with varicose veins, or if this happens in another part of the body, hemorrhoids.

如果这些瓣膜泄漏，或者静脉压力过大，血液回流会拉伸和扭曲静脉，留下静脉曲张，或者如果这种情况发生在身体的另一个部位，就会长痔疮。