Varicose veins are the result of venous hypertension and can cause significant damage to the deep vein system. Spider veins are essentially branch veins near the surface of the skin and are inherently benign.
Over 300+ thousand inviduals are diagosed with deep vein thrombosis (DVT) each year - a disease where blood clots form and could lead to serious side effects including death. Many people are not even aware of the fact as the symptoms are generally difficult for most to recognize at first. Tired legs or cramps in the ankles and calves, long plane rides that leave your legs swollen and uncomfortable, even restless legs during the night. Many of these common symptoms are often associated with getting older - nothing more, nothing less. Having DVT on the other hand is really quite serious, however, and if these symptoms are noticed during the day you should seek a consultation from a trained vein specialist.