Varithena starts working immediately once injected, damaging the inner lining of the treated vein within minutes. But the results you actually care about, visible vein fading and symptom relief, unfold over days to weeks. Most people notice their legs feeling lighter within the first week, and the cosmetic improvement becomes clearly measurable by the eight-week mark.
What Happens Right After Injection
Varithena is a prescription foam made from a sclerosing agent that, once injected into a varicose vein, displaces the blood inside and makes prolonged contact with the vein wall. Liquid sclerosants get diluted by blood and deactivated quickly, but the foam version clings to the vein lining long enough to destroy the cells there. This triggers the vein to seal shut and eventually be reabsorbed by the body. The entire injection procedure typically takes under an hour, and you walk out of the office the same day.
When Symptoms Start Improving
The physical relief tends to arrive before the visual results. Many patients report that their legs feel lighter and more energized within days of treatment. Symptoms like aching, heaviness, and itching typically begin to diminish within the first week. This early improvement reflects the fact that the problematic vein is no longer pooling blood, so the pressure causing your discomfort drops quickly even before the vein has fully disappeared.
When Veins Visibly Fade
Cosmetic results take longer. In a multicenter, placebo-controlled clinical trial, both patients and physicians rated significant improvement in varicose vein appearance at the eight-week assessment. Patients treated with Varithena scored an average 1.9-point improvement on a validated appearance scale, compared to just 0.1 points for the placebo group. That difference was statistically overwhelming.
The timeline makes sense biologically: once the vein seals, your body gradually breaks it down and absorbs the tissue. This process plays out over several weeks. You’ll likely notice progressive fading between weeks two and eight, with continued improvement through the 12-week follow-up period used in clinical studies. Some veins take the full three months to reach their final appearance.
Side Effects and How Long They Last
Bruising and tenderness around the injection site are common in the first week or two and resolve on their own. A more persistent side effect is skin darkening (hyperpigmentation) along the path of the treated vein. When this occurs, it can take several months to fade, and in some cases it lingers for a year or more before resolving completely. Not everyone develops hyperpigmentation, but it’s worth knowing about so you’re not alarmed if a brownish streak appears where your vein used to be.
How Long Results Last
Once a vein successfully closes, it stays closed in the majority of cases. One study tracking outcomes found an anatomic failure rate of about 10.6% in below-knee truncal veins treated with Varithena, meaning roughly 9 out of 10 treated veins remained sealed on follow-up ultrasound. That failure rate is comparable to thermal ablation (laser treatment), which is considered the standard for durability. If a treated vein does reopen, a repeat treatment session is straightforward.
Recovery and Compression Timeline
Your recovery schedule directly affects how well Varithena works. For the first 48 hours, you’ll keep your bandages and compression stockings on without removing them. After that, you remove the bandages, shower, and switch to compression socks worn around the clock, day and night, for the first 14 days. This sustained compression helps keep the treated vein walls pressed together while they seal permanently. Skipping or shortcutting compression can reduce the treatment’s effectiveness.
Walking is encouraged right away and actually helps recovery by promoting healthy blood flow through your remaining veins. Heavy exercise, prolonged standing, and hot baths are generally restricted during the initial two-week compression period, though your provider will give you specific guidance based on which veins were treated.
What a Realistic Timeline Looks Like
Putting it all together, here’s what to expect:
- Day of treatment: The foam seals the vein. You go home in compression wraps.
- Days 1 to 7: Legs often feel lighter. Some bruising and tenderness is normal.
- Weeks 2 to 4: Treated veins begin to fade. Aching and heaviness continue to improve.
- Week 8: The point where clinical trials measured clear, significant cosmetic improvement.
- Week 12 and beyond: Final results settle in. Any remaining hyperpigmentation continues to fade gradually.
If you need more than one treatment session, they must be spaced at least five days apart, and no more than 15 mL of foam is used per session. Some people need a single session; others with more extensive varicose veins may need two or three to treat all affected areas. Each session restarts the same recovery timeline for the newly treated veins.