Proper Evaluation A Must
It's important to properly evaluate the vein before treatment. Without seeing a photo, it is difficult to assess, but bluish veins can be a venous lake, angioma, telangiectasia, as well as a dilated vein. If it has been present for years, a venous malformation is also possible. I would see a dermatologist who has experience in vascular lesions.
Treatment for these veins really depends on the size and depth of the blood vessels. Lasers are the best with the least...