Spider Veins (telangiectasia) are the smallest veins nearest to the surface of the skin. These veins can sometimes have pain or itching associated with them, but for the most part, they are treated because they are cosmetically undesirable.

In more advanced venous disease the skin can undergo changes such as discoloration or thickening. These changes are thought to be a result of the pooling of blood and added pressure in the leg as the vein valves fail to bring blood out of the foot and leg adequately.

Venous ulcers occur when the skin breaks down completely as a result of untreated venous disease. This type of ulcer is often tough to heal and even if it does heal, if the venous disease is not treated the ulcer will often recur.

SVT is a relatively common inflammatory process affecting the superficial veins. This is an acute process where a clot forms in a superficial vein resulting in a red, hot, tender area around the affected vein.