Vein treatment is any medical procedure designed to close, remove, or shrink veins that aren’t working properly, most commonly varicose veins and spider veins. These treatments range from injections and heat-based catheter procedures to medical adhesives and minor surgery, and most are now performed in an office setting with local anesthesia. The goal is always the same: shut down the faulty vein so blood reroutes through healthier ones nearby.
Why Veins Need Treatment
Veins carry blood back to the heart, and tiny one-way valves inside them keep that flow moving upward against gravity. When those valves weaken or fail, blood pools and the vein swells. This is called venous insufficiency, and it exists on a spectrum. At the mild end you get spider veins (thin, web-like clusters under the skin) and varicose veins (ropy, bulging veins 3 mm or wider). At the severe end, chronic pooling causes skin discoloration, thickening of the tissue around the ankle, and eventually open wounds called venous ulcers that are slow to heal.
Not everyone with visible veins needs a procedure. Some people seek treatment purely for cosmetic reasons, while others have symptoms like aching, heaviness, swelling, itching, or restless legs that interfere with daily life. The further the disease has progressed, the stronger the medical case for intervention.
Conservative Treatment: Compression Therapy
Before any procedure, the first line of treatment is almost always compression stockings. These graduated-pressure garments squeeze tightest at the ankle and gradually loosen up the leg, helping push blood back toward the heart. Medical-grade stockings typically fall into pressure ranges: light (around 15 to 21 mmHg), moderate (23 to 32 mmHg), and strong (34 to 46 mmHg). Your doctor chooses the level based on how severe your symptoms are. Compression stockings improve the pumping action of your calf muscles, reduce the volume of blood sitting in the vein, and can meaningfully ease swelling and discomfort.
Compression therapy doesn’t fix damaged valves or make varicose veins disappear. It manages symptoms and can slow progression, but many people eventually need a procedural treatment. Up to a third of insurance companies require a documented trial of compression therapy before they’ll approve a catheter-based procedure, so keeping a record of how long you wore them and whether symptoms improved matters.
Sclerotherapy for Spider and Small Veins
Sclerotherapy is the most common treatment for spider veins and small varicose veins. A doctor injects a chemical solution directly into the problem vein. That solution damages the inner lining of the vein wall, causing it to seal shut and eventually be absorbed by the body. Different types of solutions work in slightly different ways: some dehydrate the cells lining the vein, while others dissolve the cell membranes, but the end result is the same.
When the solution is mixed into a foam (called microfoam), it makes better contact with the vein wall and pushes blood out of the way, which improves results. Clinical studies show that properly performed sclerotherapy resolves 80 to 90% of treated vessels, and foam techniques push that above 90% for spider veins and small tributary veins. Sessions typically take 15 to 30 minutes, and you may need more than one round to fully clear an area. Afterward, you’ll wear compression stockings for a few days to a few weeks.
The blood clot risk with sclerotherapy is low. In a large analysis of over 35,000 vein procedures, the rate of a clot traveling to a deep vein or the lungs after sclerotherapy was about 0.19%, the lowest of any treatment modality.
Heat-Based Catheter Procedures
For larger varicose veins, particularly the long saphenous vein that runs from the ankle to the groin, doctors use catheter-delivered heat to destroy the vein from the inside. Two technologies dominate: laser ablation and radiofrequency ablation. Both follow a similar playbook. Under ultrasound guidance, a thin catheter is threaded into the vein through a tiny needle puncture. A numbing fluid is injected around the vein to protect surrounding tissue, and then the catheter delivers heat as it’s slowly pulled back, sealing the vein shut segment by segment.
Laser ablation uses focused light energy, while radiofrequency ablation uses electrical energy converted to heat. Both are highly effective. In one study that treated both legs of the same patients (laser on one side, radiofrequency on the other), laser ablation achieved 100% vein closure at six months with no veins reopening. Radiofrequency had a 6.8% reopening rate over the same period. That said, both methods produce good long-term results, and some patients find radiofrequency slightly less uncomfortable during recovery because it delivers heat at a lower, more controlled temperature.
Over five years, about 45% of laser patients and 54% of surgery patients in one randomized trial showed some form of recurrence, though these numbers include new varicose veins appearing in different areas of the leg, not just the original treatment site failing. The overall blood clot risk for laser ablation sits around 0.47%, rising to about 1.26% when it’s combined with phlebectomy in the same session.
Medical Adhesive Closure
A newer option skips heat entirely. Medical-grade cyanoacrylate glue (a specially formulated version of the adhesive family that includes superglue) is injected into the vein through a catheter. The glue rapidly hardens on contact with blood, sealing the vein shut and triggering the body’s natural process of breaking it down over time.
The main advantage is that this approach requires no numbing injections along the length of the vein, which makes the procedure faster, more comfortable, and eliminates the risk of heat-related skin burns or nerve irritation. Clinical results are comparable to thermal methods. Because there’s no heat involved, you also typically don’t need to wear compression stockings afterward, which many patients prefer.
Ambulatory Phlebectomy
When varicose veins are close to the surface and too large or winding for injections, a doctor can physically remove them through a series of tiny punctures. The technique is called ambulatory phlebectomy. After numbing the skin and tissue around the vein, the doctor makes incisions about 2 mm long, inserts a small hook to grab the vein, and gently pulls it out in segments. Long stretches of vein can often come through a single puncture point. The incisions are so small they typically don’t need stitches, just adhesive strips and a compression dressing.
Phlebectomy works for both symptomatic and cosmetic cases. It’s often paired with a catheter-based treatment: the catheter handles the deeper source vein, and phlebectomy removes the visible surface branches in the same visit or a follow-up session.
What Recovery Looks Like
Most minimally invasive vein procedures share a similar recovery arc. You walk out of the office the same day, and light activity like short walks is encouraged immediately because movement promotes healthy blood flow. During the first week, expect some bruising, mild soreness, and tightness along the treated vein. Most people return to work within a few days.
The main restrictions are temporary. Avoid strenuous exercise, heavy lifting, and hot baths for about a week. Gentle walking is the ideal activity during this window. Your doctor will likely ask you to wear compression stockings for a few weeks, depending on the procedure. After sclerotherapy, the timeline for stockings is usually shorter, sometimes just a few days. By two to three weeks, most patients are back to their full routine.
How Insurance Decisions Work
Insurance generally covers vein treatment when it’s deemed medically necessary, meaning you have documented symptoms, ultrasound-confirmed valve failure, or complications like skin changes and ulcers. Cosmetic treatment of spider veins without symptoms is almost never covered. The approval process often involves completing a period of conservative management first, typically three to six months of compression stocking use, along with ultrasound imaging that shows reflux (backward blood flow) in the affected veins. If that conservative trial doesn’t relieve your symptoms, the case for procedural treatment becomes much stronger in the eyes of an insurer.