Varicose veins can be caused be weakened valves in the veins or weakened walls of the veins, or by inflammation in the veins (phlebitis).
Typical varicose vein surgery involves a scalpel incision, and then a large needle and sheath pass a laser catheter into the blood vessel. This can leave small scars, especially on dark skin.
David Greuner, M.D., a cardiovascular surgeon at NYC Surgical Associates explained, “When these people have a lot of venous disease and require a lot ...
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2016

Occasionally, varicose veins can form a painful blood clot with inflammation of the vein, a condition called thrombophlebitis.