Spider veins — those thin, web-like red, blue, or purple lines just under the skin — are one of the most common cosmetic skin concerns, affecting an estimated 50% of women and a significant share of men over their lifetime, according to the American Academy of Dermatology (AAD). Despite how common they are, most people have never had a clear explanation of why they show up, whether they matter medically, or what actually gets rid of them.
What Causes Spider Veins?
Spider veins form when small blood vessels weaken or their valves stop working efficiently, causing blood to pool and the vessel to enlarge and become visible. Veins rely on one-way valves to keep blood moving toward the heart; when those valves weaken, blood can flow backward and pool, stretching the vessel wall until it becomes visible through the skin.
Common contributing factors include genetics (family history is one of the strongest predictors), prolonged standing or sitting, hormonal changes such as pregnancy, birth control, and menopause, age-related vessel wall weakening, and cumulative sun exposure, which is especially common for spider veins that appear on the face and nose. Occupations that involve long periods on your feet, as well as significant weight fluctuation, can also increase the likelihood of developing them.
Are Spider Veins a Medical Concern?
In most cases, spider veins are a cosmetic issue rather than a health risk. However, they can occasionally signal underlying venous insufficiency, particularly when accompanied by aching, heaviness, swelling, or larger varicose veins nearby. A dermatologic evaluation can help distinguish purely cosmetic spider veins from a sign of a circulatory issue that may need further workup, such as a venous ultrasound.
Spider Veins vs. Varicose Veins
The two are often confused, but they're different in scale. Spider veins are small, thread-like, and sit close to the skin's surface, usually causing no physical symptoms beyond their appearance. Varicose veins are larger, raised, and often twisted or bulging under the skin, and are more likely to cause aching, throbbing, or a feeling of heaviness in the legs by the end of the day. Someone can have both, and in some cases spider veins are a visible sign of the same underlying venous insufficiency that causes varicose veins nearby.
How Are Spider Veins Treated?
The two most established in-office treatments are:
Sclerotherapy: A concentrated solution is injected directly into the vein, causing it to collapse and fade over several weeks. It's considered the gold-standard treatment for spider veins on the legs, per the American Society for Dermatologic Surgery (ASDS). It works especially well for larger clusters of leg veins and can address multiple vessels in a single session.
Laser Vein Treatment (Excel V): A targeted laser wavelength heats and closes off small facial and leg veins without needles, making it a good option for delicate areas like the nose and cheeks, or for patients who prefer to avoid injections. Laser treatment tends to be the better fit for very fine, superficial vessels, especially on the face.
Many patients ask which option is "better." In practice, the choice depends on vein size, location, and depth rather than one treatment being universally superior. Larger, deeper leg veins typically respond better to sclerotherapy, while fine facial capillaries are often better suited to laser treatment. Some patients benefit from a combination of both.
What to Expect From Treatment
Sclerotherapy sessions are typically quick, ranging from 15 minutes to an hour depending on how many veins are being treated. Discomfort is generally mild — often described as small pinches. Laser treatment for facial veins is similarly quick and usually involves a brief sensation of heat or a light snapping feeling. Neither treatment requires significant downtime, and most patients resume normal activity the same day, though compression stockings are often recommended after sclerotherapy on the legs.
How Many Sessions Will You Need?
Most patients need a small series of sessions, spaced several weeks apart, for optimal fading. A single vein may need only one treatment, while a larger network of vessels can require two to four sessions. Results are gradual and cumulative: treated veins typically begin to fade within three to six weeks, though some larger vessels can take a couple of months to fully clear.
Will Spider Veins Come Back?
Once a vein is successfully treated, it does not return — the body reabsorbs the collapsed vessel. However, new spider veins can form over time in other areas, particularly if the same risk factors (genetics, prolonged standing, hormonal changes) remain in play. Preventive habits like wearing compression stockings, staying active, elevating your legs when resting, and consistent sun protection for facial veins can help reduce the likelihood of new veins developing.
Frequently Asked Questions
Is sclerotherapy painful?
Most patients describe it as a series of small pinches rather than significant pain. No anesthesia is typically required.
Can spider veins be prevented?
You can't fully prevent them if you're genetically predisposed, but compression stockings, regular movement, and sun protection can reduce your risk and slow the development of new veins.
Are spider veins covered by insurance?
Because treatment is typically considered cosmetic, it's usually not covered by insurance unless there's a documented medical symptom, such as significant pain associated with underlying venous insufficiency.
Is laser treatment or sclerotherapy better for facial spider veins?
Laser treatment (like Excel V) is generally preferred for the face, since it avoids needles and works well on the finer, more superficial vessels typically seen there.
How soon can I see results?
Most patients notice initial fading within three to six weeks, with continued improvement over the following months as the body clears the treated vessels.
Ready to Address Your Spider Veins?
Dr. Karp and the team at Journelle Skin evaluate each case individually to determine whether sclerotherapy, laser treatment, or a combination will give you the clearest results. Learn more about our Sclerotherapy and Excel V laser vein treatment options in NYC.