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What Are Spider Veins?
Medically verified
Last updated on 1/29/2026
By Dr. Michael Nguyen
Vein Doctor at Vein Treatment Clinic
Harvard Medical School
Board Certified by the American Board of Venous and Lymphatic Medicine
Spider veins are small, visible veins that appear close to the surface of the skin. They often look red, blue, or purple and may form web-like or branching patterns.
Many people notice spider veins because of appearance, while others experience itching, burning, or mild discomfort in the areas where they appear.
Understanding what spider veins are and why they form helps patients decide when monitoring is appropriate and when evaluation or treatment may be helpful.
If you’re unsure whether your visible veins are spider veins or something else, a vein evaluation can help clarify what’s happening.
What exactly are spider veins?
Spider veins are tiny blood vessels that have widened and become visible near the skin’s surface.
They are smaller and flatter than varicose veins and do not usually bulge above the skin.
Spider Vein before and after treatment pictures.
Results may vary according to each case.
Spider Vein before and after treatment pictures.
Results may vary according to each case.
Why are they called “spider” veins?
The name comes from their appearance. Spider veins often resemble spider webs or branching patterns.
They can appear as thin lines or clusters, commonly on the legs and sometimes on the face.
What do spider veins look like?
Spider veins typically appear red, blue, or purple and are visible through the skin.
They are usually flat and may spread outward from a central point.
Symptom Checker
Where do spider veins usually appear?
Spider veins most commonly appear on the thighs, calves, ankles, and behind the knees.
They can also appear on the face, especially around the nose and cheeks.
Are spider veins the same as varicose veins?
No. Spider veins are smaller and closer to the skin, while varicose veins are larger, deeper, and often bulge above the surface.
Varicose veins are more likely to be associated with underlying circulation problems.
Small Spiders or Bulging Veins? Learn to Know the Difference
Do spider veins cause symptoms?
Many spider veins cause no symptoms and are noticed only because of appearance.
Some patients experience itching, burning, aching, or tenderness in the affected areas.
Before
After
A 37-year-old patient visited our Vein Treatment Clinic, seeking relief from unsightly and painful varicose and spider veins. We performed radiofrequency ablation and sclerotherapy treatments, significantly improving the veins’ appearance and completely eliminating discomfort. The patient is now enjoying a more active and pain-free lifestyle.
Before
After
A 69 year-old patient visited our California Vein Clinic, embarrassed by spider veins that had impacted their self-esteem. We performed radiofrequency ablation and sclerotherapy treatments, leaving their legs smooth and healthy. The patient now feels more confident, thanks to this transformative treatment.
Before
After
This 84 year-old patient at our New Jersey Vein Treatment Clinic came in with spider veins that had affected their daily routine. We used radiofrequency ablation and sclerotherapy treatments to relieve discomfort and restore both their leg health and confidence. The patient now enjoys a more active and fulfilling lifestyle, free from pain.
Before
After
At our Long Island Vein Clinic, we treated this 75 year-old patient with spider veins using radiofrequency ablation and sclerotherapy. These minimally invasive treatments improved both the patient’s appearance and overall well-being, offering transformative results.
Before
After
This 75 year-old patient visited our Long Island Vein Treatment Clinic with painful spider veins. We used radiofrequency ablation and sclerotherapy, minimally invasive treatments, to eliminate the veins and restore comfort and confidence. The patient experienced life-changing results
Are spider veins cosmetic or medical?
Spider veins are usually considered cosmetic.
In some cases, especially when accompanied by symptoms or recurrent patterns, they may be related to underlying vein pressure.
Can spider veins get worse over time?
Spider veins can increase in number or spread over time, especially if contributing factors are not addressed.
They do not typically lead to serious complications but may continue to recur.
Should spider veins be evaluated?
Evaluation is recommended if spider veins are associated with pain, swelling, or repeated recurrence after prior treatment.
A vein evaluation helps determine whether spider veins are isolated or related to deeper vein issues.