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Spider Veins vs. Varicose Veins: Understanding the Difference

Published July 20th, 2026 by Great Lakes Medical Imaging

If you have noticed new veins on your legs, you may be wondering whether they are something to worry about or simply a cosmetic change. Two of the most common questions we hear are about the small web-like veins near the skin and the larger, rope-like veins that bulge above the surface. They can look related, but they are not always the same thing, and the difference sometimes matters for your health.

At Great Lakes Medical Imaging (GLMI), we help patients across Buffalo and Western New York, including Williamsville, Cheektowaga, Orchard Park, and the Cambria area of Niagara County, understand what is happening with their leg veins. This article walks you through the difference between spider veins and varicose veins, the symptoms that deserve a closer look, and how a simple imaging study can give you answers.

What Are Spider Veins?

Spider veins are small, thin veins that sit close to the surface of the skin. They are usually red, blue, or purple, and they often appear in a web-like or branching pattern, which is how they got their name. You will most commonly see them on the legs or face.

For most people, spider veins are painless. Because they tend to be small and shallow, they are frequently considered a cosmetic concern rather than a medical one. Still, it is worth paying attention to them, because in some cases visible surface veins can be a clue that the deeper venous system is under strain.

What Are Varicose Veins?

Varicose veins are different. These are the larger, raised veins that look rope-like or bulging, and they most often appear on the legs. Rather than lying flat like spider veins, they can stand up above the surface and twist along the leg.

Varicose veins are more likely than spider veins to come with symptoms, and they can be a sign of something happening below the surface. In particular, they may point to venous reflux, also called venous insufficiency. This is a condition where the small valves inside your leg veins are not working the way they should. Normally those valves keep blood flowing upward, back toward the heart. When they weaken, blood can pool in the legs, and over time that pooling can lead to the bulging veins and uncomfortable symptoms many people describe.

How to Tell Them Apart

Here is a simple way to think about the two:

Spider veins: small, thin, flat, red or blue or purple, in a web or branching pattern, usually painless, often considered cosmetic.
Varicose veins: larger, raised, rope-like or bulging, most often on the legs, more likely to cause symptoms, and sometimes a signal of underlying venous reflux.

The key point is this: spider veins are usually about appearance, while varicose veins can be about how your circulation is working. That is why varicose veins, especially when they come with discomfort, are worth having evaluated.

Symptoms That May Warrant an Evaluation

Sometimes the veins you can see are only part of the story. The way your legs feel can tell you just as much. If you notice any of the following, it may be time for a varicose vein screening:

Leg pain, aching, or cramping
Burning or itching of the skin
Leg or ankle swelling, especially toward the end of the day
A heavy feeling in the legs
Visible varicose veins
Skin discoloration or changes in skin texture
Open wounds or sores
Restless legs

These symptoms can interfere with everyday life in Western New York, whether you are on your feet for work or staying active through our long winters. If your legs ache or swell by the end of the day, it is reasonable to find out why. If any of these sound familiar, you can contact GLMI, or call our team at 716-836-4646.

How Imaging Reveals What Is Happening Below the Surface

You cannot tell from the outside whether your vein valves are working properly. The veins you see on the skin may or may not reflect a deeper problem. That is where imaging comes in.

The first step in a leg vein evaluation is simply an ultrasound, specifically a venous insufficiency study, sometimes called a venous Doppler study. This is a comfortable, painless test that uses sound waves to look at how blood is flowing through your leg veins. It can show whether the valves are letting blood flow backward and pool, the hallmark of venous reflux.

An ultrasound gives your provider real information instead of a guess. To learn more about how this study fits into the broader picture of imaging services, you can also read about veins and venous disease and how these conditions are evaluated and managed.

What Happens If Venous Reflux Is Found

If your ultrasound shows that venous reflux is causing your varicose veins, there is a treatment that addresses the underlying problem rather than only the surface appearance. At GLMI, varicose veins arising from venous reflux are treated with the ClosureFast radiofrequency ablation (RFA) procedure.

This is a minimally invasive treatment that uses radiofrequency heat to seal the affected vein. Once that vein is closed, blood naturally reroutes to nearby healthy veins, which improves circulation in the leg. In most cases, the procedure also reduces the appearance of the visible varicose veins, so you may see a cosmetic improvement as a welcome side effect of treating the root cause. ClosureFast is covered by most insurances.

It is worth being clear about what this means for spider veins. Spider veins on their own are generally a cosmetic matter, and the focus of an evaluation here is on identifying and treating varicose veins that come from venous reflux. The ultrasound tells you which category you are in.

When to Talk With a Provider

You do not need to wait for your legs to become severely uncomfortable before asking questions. If you have visible varicose veins, or if your legs ache, swell, feel heavy, burn, or feel restless, those are good reasons to start a conversation. Skin changes, discoloration, or any open sore on the lower leg should always prompt an evaluation.

Spider veins alone, with no symptoms, are usually nothing to be concerned about. But if you are unsure which type of vein you are seeing, or if visible veins come with the symptoms listed above, the simplest path to peace of mind is an ultrasound.

Convenient Care Across Western New York

GLMI offers care at locations throughout the Buffalo and Western New York region, so you can find a site that fits your commute:

Leg veins are common, and most of the time they are not a cause for alarm. The goal is simply to know the difference: spider veins are usually cosmetic, while varicose veins can point to venous reflux that is worth evaluating. An ultrasound is the straightforward first step, and if reflux is found, a covered, minimally invasive treatment is available. If you are ready to get answers, schedule a visit with GLMI today, or call us at 716-836-4646.

Medical Disclaimer: This article is intended for educational purposes only and does not constitute medical advice. Always consult your physician or qualified healthcare provider regarding any questions you may have about a medical condition or appropriate diagnostic testing. Individual health circumstances vary, and decisions about imaging or treatment should be made in consultation with your healthcare provider.

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