Removing varicose veins is safe for most people. Modern procedures are minimally invasive, performed under local anesthesia, and carry low rates of serious complications. Deep vein thrombosis, the most concerning risk, occurs in roughly 2 to 3% of cases, and life-threatening events like pulmonary embolism happen in about 0.1% or fewer. That puts varicose vein treatment among the lower-risk procedures in vascular medicine.
That said, “safe” doesn’t mean “zero risk.” The type of procedure, your overall health, and how well you follow aftercare instructions all influence your outcome. Here’s what the evidence shows for each approach.
How Modern Treatments Compare to Traditional Surgery
Most varicose veins today are treated with minimally invasive techniques rather than the older surgical approach of physically pulling the vein out (called stripping). The shift happened because heat-based and chemical-based methods produce fewer complications. A large meta-analysis comparing laser ablation to surgical stripping found that patients who had laser treatment were significantly less likely to develop bruising, blood clots under the skin, and infections. Surgical stripping had statistically higher complication rates across the board.
Recovery time tells a similar story, though the gap is smaller than you might expect. One study within that analysis found patients returned to normal activities in about 4 days after laser treatment versus 15 days after surgery. But when researchers pooled data from multiple trials, the overall difference in recovery time wasn’t statistically significant. Both approaches get people back on their feet relatively quickly.
Risks of Heat-Based Treatments
Laser ablation and radiofrequency ablation are the most common procedures. Both work by threading a thin catheter into the damaged vein and using heat to seal it shut. The vein collapses and your body eventually absorbs it, rerouting blood through healthier veins.
In a study of 500 laser ablation patients, minor complications included swelling (7.2%), bruising (6.4%), infection (4%), and nerve irritation (3.6%). These typically resolve on their own within days to weeks. Deep vein thrombosis occurred in 2% of patients, and no cases of pulmonary embolism or major cardiac events were recorded.
A larger analysis of over 430,000 ablation procedures found a 30-day DVT rate of 3.2%, with laser ablation slightly outperforming radiofrequency (2.8% versus 3.4%). Pulmonary embolism within 30 days occurred in just 0.1% of cases. Laser ablation also had a small edge here, with a rate of 0.09% compared to 0.11% for radiofrequency. Both numbers are very low.
Heat-based procedures can also cause a specific issue called endothermal heat-induced thrombosis, where a small clot forms near the junction of the treated vein and a deeper vein. This occurred in about 9% of laser patients in one study, but only 0.8% of those cases were severe enough to need additional treatment.
Risks of Foam Sclerotherapy
Sclerotherapy involves injecting a chemical foam into the vein to irritate its walls and cause it to close. It’s often used for smaller varicose veins or as a follow-up to heat-based treatment.
The most common side effect is skin darkening along the treated vein. In one study of 156 patients, over half (53%) had visible pigmentation two weeks after treatment. By three months, that number dropped to about 35%, and it continues to fade over time for most people. Skin necrosis, where a small area of tissue dies near the injection site, affected about 5.5% of patients at two weeks but resolved completely by three months. Published rates for this complication in the broader literature range from 0.2% to 1.2%.
Sclerotherapy doesn’t use heat, so it avoids the nerve injury risk associated with thermal procedures. But it does carry its own DVT risk and can cause inflammation of the treated vein (phlebitis), which feels like a firm, tender cord under the skin.
Risks of Medical Glue Closure
A newer option uses medical-grade glue (cyanoacrylate) to seal veins shut. The main advantage is that it requires no heat and no tumescent anesthesia, the numbing fluid injected around the vein in other procedures. The glue has a long safety track record from other medical uses, including wound closure and blood vessel repair.
The unique risk with glue closure is an allergic or inflammatory reaction. A large national survey in Japan found that 11 to 15% of patients developed localized phlebitis or allergic reactions. Of those, 299 cases were significant enough to require steroid treatment, and 66 patients had systemic allergic reactions needing oral or intravenous steroids. No cases of anaphylaxis were reported. If you have a known sensitivity to cyanoacrylate (the same compound in some skin glues and superglue), this method may not be appropriate for you.
Who Should Not Have Varicose Veins Removed
There are a few situations where vein removal is not safe. You should not have the procedure if you have an active deep vein thrombosis, because removing a surface vein while the deep system is blocked could leave your leg without adequate drainage. Pregnancy is another contraindication, both because varicose veins often improve after delivery and because the procedure carries unnecessary risk to the pregnancy.
People whose varicose veins are serving as detour routes for blood, compensating for blocked deeper veins, should also avoid removal. Taking away those surface veins would make circulation worse, not better. Significant arterial insufficiency, where blood flow to the legs is already compromised, is another reason to hold off. In all of these cases, imaging to confirm that the deep venous system is open and functioning properly is essential before any treatment moves forward.
What Recovery Looks Like
After a minimally invasive procedure, most people walk out of the clinic the same day. You’ll typically wear a compression bandage for the first 24 hours, then switch to compression stockings. Guidelines from the UK’s National Institute of Health and Care Excellence recommend wearing compression for no more than 7 days after treatment. Research supports this: one study found that compression stockings reduced pain during the first postoperative week, but wearing them beyond that point offered no additional benefit.
The recommended compression pressure is generally in the 23 to 32 mmHg range, which feels like a firm squeeze but shouldn’t be painful. Most people return to desk work within a few days and resume exercise within one to two weeks, though your provider will give you specific guidance based on the extent of your treatment.
Bruising and tenderness along the treated vein are normal and typically peak around day three before gradually fading. Some people feel a pulling sensation or firmness where the vein was sealed. This is part of the healing process and resolves over several weeks.
The Bigger Risk of Doing Nothing
Varicose veins are not purely cosmetic. Left untreated, they can lead to chronic swelling, skin changes, and eventually venous ulcers, open sores near the ankle that are difficult to heal. The progression is slow, often taking years, but the complications of advanced venous disease are significantly harder to manage than the risks of treatment. For most people with symptomatic varicose veins, the balance of evidence favors treatment over watchful waiting.