Varicose veins are not as dangerous disease as they might feel in reading or hearing the name of this term. First of all, you need to be aware of the functions that veins perform in our body; well; veins and arteries both are used to carry blood from heart to body and vice versa. However, veins play an integral role in taking the blood back from body to heart; blood in veins tend to be darker and thicker as compared to arteries. Now, you must have seen green and purple lines under your skin? They are your veins which are varicose. Now the question arises here, what are the varicose veins? The answer is, when you veins become stretched and swollen then they become varicose and it is due to this fact that you often see purple and other color tiny veins underneath your skin. According to all the studies which have been done by now varicose veins are not dangerous; however, in certain situation they can turn into a problematic situation for the sufferer. But the chances of such condition are usually rare.