Spider and varicose veins are conditions that appear as visible veins that are just below the surface of your skin. Spider veins, also known as telangiectasia, are harmless and look like fine web-like red, purple, or blue lines. Varicose veins are larger veins that look swollen and may cause discomfort, itching, and other symptoms. Most varicose veins are harmless, but some can indicate deep vein thrombosis. We treat spider and varicose veins with laser therapy to destroy the damaged veins.