Updated:
by
Dr. Leslie Cunningham
Medically reviewed by Dr. Leslie Cunningham
You've probably noticed them. A cluster of thin red, green, or purple lines on your thigh. A web of bluish vessels fanning out along your calf or behind your knee. Maybe a faint network of veins creeping down toward your ankle that wasn't there a few years ago. You might have brushed it off as a cosmetic nuisance — something to hide with pants or longer skirts.
Problem solved, right?
Wrong.
Those small visible veins are often your body's earliest signal that something is off with your circulation—and ignoring them can allow an underlying condition called small vein disease to quietly progress into something harder to treat.
In this blog, you'll learn what small vein disease is, why it matters beyond appearance, and what your treatment options might be. This article was developed with clinical input from Center for Vein Restoration (CVR) vein specialist, Leslie Cunningham, MD, PhD. He is the lead vein physician at CVR vein clinics in Saginaw, Michigan, Lansing, Michigan, and Midland, Michigan.
At CVR, our vein physicians focus exclusively on diagnosing and treating venous disease, including small veins.
📍Find a Center for Vein Restoration near you HERE
📞 Call Center for Vein Restoration at 240-249-8250
📅 Or, book an appointment online at CVR HERE
Small vein disease is an umbrella term for conditions affecting the smallest veins near the surface of your skin. These veins can be asymptomatic or associated with localized itching, burning, tingling, tenderness, easy bruising, or even bleeding. In addition to symptoms associated with the visible veins, one might note leg pain, swelling, heaviness, fatigue, or end-of-day restlessness. There are two main types of small veins that can be associated with these localized symptoms:
Spider veins (telangiectasias) are tiny, damaged blood vessels less than 1 millimeter in diameter. They sit right beneath the surface of your skin and show up as thin red, blue, or purple lines that spread out in a web or branch-like pattern. You'll usually find them on the legs, thighs, and ankles, though they can appear on the face, too.
Reticular veins are slightly larger, typically 1 to 3 millimeters wide. They sit a little deeper than spider veins, appearing as blue or green, twisted vessels under your skin. They are often connected to the more superficial spider veins, which is why they are typically treated at the same time.
Neither of these vein types rise above the skin surface, unlike the larger, bulging, rope-like varicose veins. That difference in appearance leads many people to assume small veins aren't a big deal. That assumption can be misleading and worth reconsidering.
Very common. A Cochrane Vascular systematic review found that spider veins occur in about 41 percent of women aged 50 or older. A separate body of research reported by the National Library of Medicine (NIH) found that as many as 88 percent of adult women and 79 percent of adult men have some leg spider veins. These veins are not rare, and they are not just a "women's issue."
But prevalence alone isn't the real story here. The real story is what's happening beneath the surface.
This is where most people are surprised.
Small veins that appear on your legs are often connected to a deeper problem called venous reflux, a condition where the valves in your leg veins no longer close or don’t close as quickly as they should. Normally, tiny one-way valves in your veins ensure that blood flow moves only toward your heart. When those valves weaken or fail, blood can flow toward your feet under the influence of gravity and pool in your legs. That pooling raises pressure inside the veins, and over time, that pressure causes small vessels near the surface to dilate and become visible.
"Small vein disease is often dismissed as cosmetic, but we take it seriously because the evidence tells us we should. When a patient walks in with spider veins, our first step is always a comprehensive vascular evaluation. We're not just treating what's visible — we're looking for what's driving it."
— Sanjiv Lakhanpal, MD, FACS
President and CEO of Center for Vein Restoration
Peer-reviewed research published by the NIH found that 88-89 percent of women with spider veins also have abnormal blood flow in nearby reticular (feeder) veins. Even more striking: one StatPearls study found that nearly 1 in 4 patients with spider veins and no visible varicose veins already had measurable incompetence (dysfunction of the valves) in their superficial venous system. That means the problem runs deeper than what you can see on the surface.
A cluster of spider veins around the ankle, in particular, is recognized by vascular specialists as a clinical marker of more significant underlying venous disease.
Small vein disease is officially classified under the CEAP system, the globally recognized medical classification for chronic venous disorders, as Class C1, the earliest clinical stage. This classification system exists because the medical community recognizes that these veins are most often part of a disease spectrum rather than a separate cosmetic concern.
The earliest stages of vein disease tend to feel more like inconvenience than illness: legs that are tired or ache after a long day, maybe with occasional muscle cramps at night, and spider veins that seem to multiply. A vein specialist will typically recommend building good habits early, such as regular activity, elevating the legs above heart level when resting, and wearing compression socks, leggings, or sleeves during the day when your legs are down.
Many people think small vein disease is silent except for how it looks. But research tells a different story.
A PubMed-published study found that among patients with mild to moderate venous insufficiency, the category that includes early small-vein disease, 66 percent reported itching, nearly half reported a burning sensation, and 44 percent had concurrent pain. Another large cross-sectional study of more than 2,400 adults published in PubMed found that aching, itching, heaviness, tired legs (fatigue), and swelling were all significantly associated with visible venous disease, including telangiectasias.
Common symptoms associated with small vein disease include:
These symptoms often get blamed on age, long workdays, or footwear. In reality, they may be your circulatory system asking for attention.
👉 Book your consultation with a CVR vein specialist today and discover how simple relief can be.
Small vein disease can affect anyone, but certain factors raise your risk:
Small vein disease is progressive. Left untreated, venous reflux tends to worsen over time, leading to larger varicose veins, increased swelling, skin changes, and, in some cases, venous ulcers that are difficult to heal and prone to recurrence unless the underlying vein problem is addressed.
The key to preventing that progression is to catch the problem early and understand what's driving it. That requires more than just looking at the veins on your skin's surface. It requires a thorough understanding of the venous system's function.
Before any treatment begins, vascular specialists use duplex ultrasound imaging to assess the function of the valves in your leg veins in real time. This painless, non-invasive test reveals whether any underlying venous reflux is present, its severity, and which veins are affected. Treating spider veins without addressing the underlying reflux leads to more rapid recurrence — the small veins return because the underlying cause was never addressed.
When properly diagnosed, small vein disease is very treatable. The most common and effective options include:
Sclerotherapy is considered the gold-standard first-line treatment for spider veins and reticular veins. A specialist injects a solution directly into the affected vessels, which causes them to collapse and eventually be absorbed by the body. It is a minimally invasive, in-office procedure.
Laser and light-based therapies can be used to close tiny superficial vessels that are too small to access for injection.
Compression therapy supports treatment, helps manage ongoing symptoms, and delays or prevents recurrence by reducing the pressure buildup in leg veins.
For veins associated with deeper reflux, treating the underlying source — often through ablation (closure) of a larger feeder vein — is an important part of achieving lasting results.
📍Find a Center for Vein Restoration near you HERE
📞 Call Center for Vein Restoration at 240-249-8250
📅 Or book an appointment online HERE
Not all vein care is the same. Diagnosing and treating small vein disease correctly requires clinical expertise, advanced imaging, and a treatment plan built around your specific venous anatomy — not a one-size-fits-all approach.
Center for Vein Restoration (CVR) is the nation's largest physician-led vein care practice, with more than 120 clinic locations across the United States. CVR's physicians specialize exclusively in venous disease, bringing a level of focus and expertise that general practitioners simply cannot match.
CVR accepts most major insurance plans, including Medicare and Medicaid, and offers consultations at convenient locations near you.
Those small veins on your legs may be easy to overlook, but they deserve a closer look. Schedule a free vein screening at Center for Vein Restoration today and find out what's really going on beneath the surface.
Q: Are small veins (spider veins) dangerous?
A: Spider veins themselves are not dangerous, but they can be a sign of underlying venous reflux — a condition where blood pools in your legs due to faulty vein valves. Research shows that a large percentage of people with spider veins have measurable circulation problems that, if left untreated, can progress to more serious venous symptoms. That's why it's worth getting evaluated by a vein specialist rather than assuming they're purely cosmetic.
Q: What is the difference between spider veins, reticular veins, and varicose veins?
A: Spider veins are the smallest (less than 1mm in diameter), appearing as thin red, blue, or purple lines just under the skin's surface. Reticular veins are slightly larger (1–3mm), sit a bit deeper, and often appear green or bluish. Varicose veins are the largest, typically 4mm or wider, and often visibly bulge above the skin. All three exist on the same spectrum of venous disease and may share an underlying cause.
Q: Can small vein disease cause pain?
A: Yes. While some people with spider and reticular veins have no symptoms, clinical research published in peer-reviewed medical journals shows that aching, itching, burning, tingling, heaviness, ache, and leg fatigue are all common in people with early-stage venous disease. Symptoms often worsen after prolonged sitting or standing and tend to improve with leg elevation or walking.
Q: Is small vein disease treatable?
A: Absolutely. Sclerotherapy, which is a minimally invasive injection treatment, is the gold-standard treatment for spider and reticular veins and is performed in a physician's office. Laser therapy and compression therapy are also options, but are frequently less effective. Effective treatment starts with a thorough vascular evaluation to identify any underlying venous reflux that needs to be addressed, as well as the surface veins.
Q: Does insurance cover treatment for small vein disease?
A: Coverage depends on whether your symptoms are medical (pain, heaviness, swelling) or purely cosmetic. Center for Vein Restoration works with most major insurance plans, including Medicare and Medicaid, and can help determine your eligibility during a consultation.
Q: How do I know if my symptoms are caused by venous disease?
A: The only way to know for certain is through a professional evaluation that includes a duplex ultrasound, which measures blood flow in your leg veins in real time. Center for Vein Restoration offers free vein screenings at more than 120 locations nationwide.
About Vein Disease
Spider Veins
Varicose Veins
Vein Disease Treatments
Treating Spider Veins
Treating Varicose Veins
About Us
Patient Resources
Physician Resources