Condition
Spider Veins
Spider veins are the fine red, blue or purple lines that appear just under the skin, usually on the legs. Most are cosmetic, but sometimes they are the visible tip of underlying venous reflux, which is why a proper evaluation is worthwhile before treatment.
Medically reviewed by Dr. Roger Eduardo, MD, FASMBS, Board-Certified General Surgeon. Last reviewed August 2026.
Book a consultation →Understanding Spider Veins
Spider veins are tiny dilated vessels close to the skin surface, thinner and flatter than varicose veins. They are extremely common and often harmless, though they can be associated with aching or a burning sensation.
In some patients, spider veins accompany deeper valve problems. When spider veins come with leg heaviness, swelling or nearby varicose veins, a duplex ultrasound checks whether an underlying source needs treatment first, so the result lasts.
Symptoms
What it can feel like
- ◆Fine red, blue or purple web-like veins near the skin surface.
- ◆Usually flat, unlike bulging varicose veins.
- ◆Occasionally mild burning, itching or aching.
- ◆Most commonly on the thighs, calves and ankles.
Causes
What drives it
- ◆Dilated small surface vessels, often hereditary.
- ◆Prolonged standing, pregnancy and hormonal changes.
- ◆Sun exposure and age.
- ◆Sometimes underlying venous reflux in nearby larger veins.
When to seek care
Spider veins alone are usually not dangerous, but if they come with leg aching, swelling, or visible varicose veins, an evaluation can rule out underlying reflux. Treating a source problem first gives a better and more durable cosmetic result.
How we treat Spider Veins
Care begins with the right diagnosis, then a plan matched to you by one physician who follows you through it.
Condition FAQ
Spider Veins: common questions
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Most spider veins are cosmetic and not dangerous. Occasionally they accompany underlying venous reflux, so if you also have leg heaviness, swelling or varicose veins, an evaluation is worthwhile before treatment.
The most common treatment is sclerotherapy, where a solution is injected to close the tiny veins so they fade over several weeks. If an underlying vein is feeding them, that source is usually treated first for a lasting result.
Purely cosmetic spider-vein treatment is generally not covered by insurance. If an underlying medical vein problem is found, treatment of that source may be covered. We explain what applies to your situation.
Start your journey
Concerned about spider veins?
Book a consultation with Dr. Eduardo for a clear diagnosis and a plan matched to you.
