Sclerotherapy for Varicose Veins: How It Works & What to Expect

Varicose veins affect roughly one in three adults at some point, and Miami’s heat only makes the aching, heaviness, and swelling worse. Sclerotherapy has been the go-to treatment for these veins for decades, and for good reason. It’s quick, requires no incisions, and gets most patients back to their day the same afternoon.

At South Florida Multispecialty Medical Group, our vascular surgery team performs sclerotherapy regularly for patients dealing with both cosmetic concerns and the physical symptoms that come with diseased veins. Here’s what the procedure actually involves, what results to expect, and how to know if it’s the right option for you.

Plenty of patients put off treatment for years, assuming visible veins are just a cosmetic annoyance they’ll have to live with. In reality, many of the same veins causing self-consciousness are also the ones responsible for the aching and swelling that shows up by the end of a long day. Treating the vein often resolves both concerns at once.

What Sclerotherapy Actually Does

Sclerotherapy uses a fine needle to inject a chemical solution directly into a problem vein. That solution irritates the lining of the vessel, causing it to swell, stick together, and eventually scar shut. Once the vein closes, your body naturally reroutes blood flow through healthier veins nearby, and the treated vein fades from view over the following weeks.

This makes sclerotherapy fundamentally different from surgery. There’s no cutting, no general anesthesia, and no lengthy recovery. It works especially well on small to medium varicose veins and spider veins, the fine web-like veins that often show up on the thighs and calves.

Am I a Good Candidate for Sclerotherapy?

Most people with visible varicose or spider veins are reasonable candidates, but sclerotherapy isn’t the right fit for everyone. It’s typically not recommended if you’re pregnant, breastfeeding, or currently dealing with an active blood clot in a treated vein.

Larger, more twisted varicose veins sometimes respond better to a different approach, such as vein ablation therapy, which uses heat to close larger vessels that a needle alone can’t reach effectively. Part of your first visit involves an ultrasound and physical exam so your vascular surgeon can map your veins and recommend whichever treatment fits your specific case.

If your veins are smaller and closer to the surface, similar to what’s covered in our comparison of reticular veins versus varicose veins, sclerotherapy is often the simplest and most direct option available.

What Happens During the Procedure

Sclerotherapy is done in-office and usually takes 30 to 45 minutes, depending on how many veins need treatment. You’ll lie back with your legs slightly elevated while your provider cleans the treatment area and maps out the veins to be injected, sometimes with the help of ultrasound for veins that aren’t visible from the surface.

Using a very fine needle, your provider injects a liquid or foam solution directly into each vein. Larger veins are typically treated first. You might feel a brief pinch or mild cramping as the solution goes in, but most patients describe the sensation as far more tolerable than they expected.

After each injection, your provider applies pressure to the area to keep the solution in place and reduce bruising. Once all the targeted veins are treated, you’ll typically rest for a short period before compression stockings or bandages go on.

How to Prepare for Your Appointment

A little preparation goes a long way toward getting the best possible result from your session. Skip lotion or moisturizer on your legs the day of treatment, since it can interfere with how well the provider can see and clean your skin. Wearing loose, comfortable clothing, like shorts, makes it easier for your provider to access the treatment area without delay.

Certain medications can also affect how well sclerotherapy works or how much you bruise afterward. Blood thinners, aspirin, and anti-inflammatory drugs like ibuprofen or naproxen can increase bleeding and bruising, so your provider will typically ask you to pause these for a short window before your appointment if it’s medically safe to do so. Certain antibiotics, including tetracycline and minocycline, can also cause skin staining if taken too close to treatment.

If you’ve had compression stockings from a previous vein treatment, bring them along. Your provider can check whether they still offer enough support or whether you need a different size or compression level for this round of treatment.

Recovery Timeline and Aftercare

One of the biggest advantages of sclerotherapy is how little downtime it requires. Most patients walk out of the office and resume normal daily activities the same day. Walking is actually encouraged right after treatment, since movement helps prevent blood clots and supports healthy circulation in the legs.

You’ll likely need to wear compression stockings for anywhere from a few days to two weeks, depending on the size of the treated veins. During this window, avoid hot baths, saunas, direct sun exposure on the treated area, and strenuous exercise. Over-the-counter anti-inflammatory medications like ibuprofen are also typically discouraged for the first 48 hours, since they can interfere with how well the solution works.

Mild bruising, redness, or small brown spots at the injection sites are common and usually fade within a few weeks to a few months. Larger treated veins can feel firm or lumpy for a while as they heal, which is a normal part of the scarring process rather than a sign of a problem.

If you drive yourself to the appointment, you should still be fine to drive home afterward, though some patients prefer to have someone available just in case they feel lightheaded. Planning a lighter schedule for the rest of the day, rather than jumping straight into a workout or a long shift on your feet, tends to make the first 24 hours more comfortable.

How Long Until You See Results

Results build gradually rather than appearing overnight. Small spider veins often fade within three to six weeks, while larger varicose veins can take three to four months to show their full improvement. Some veins need a second or even third treatment session spaced several weeks apart to get the result you’re after.

Once a treated vein closes successfully, it generally doesn’t come back. That said, sclerotherapy doesn’t prevent new varicose veins from forming elsewhere, particularly if you have an underlying tendency toward vein disease. Many patients return periodically for touch-up treatments as new veins develop over the years.

Understanding the Risks

Sclerotherapy has an excellent safety record, and serious complications are uncommon. Still, it’s worth understanding what can happen. Mild side effects include temporary bruising, redness, itching, or small skin discoloration at the injection sites, all of which typically resolve within days to a few months.

Less commonly, a blood clot can form in the treated vein. In rare cases, that clot can travel to a deeper vein, a condition called deep vein thrombosis, which needs prompt medical attention. Allergic reactions to the sclerosant solution are also possible but uncommon, and your provider will watch for any signs of a reaction during your visit.

This is exactly why sclerotherapy should be performed by an experienced vascular specialist rather than at a walk-in cosmetic clinic. Knowing which veins are safe to treat, how much solution to use, and how to recognize an early complication makes a meaningful difference in both your results and your safety.

Sclerotherapy Versus Other Vein Treatments

Sclerotherapy isn’t the only option for treating problem veins, and it isn’t always the best one for every situation. Larger veins with significant backward blood flow often respond better to endovenous ablation, which closes the vein from the inside using heat or laser energy rather than a chemical solution.

Spider veins and smaller varicose veins tend to be ideal candidates for sclerotherapy specifically because the vessels are small enough for a needle-based approach to work efficiently. Understanding the root cause matters too. Weak vein valves, prolonged standing, pregnancy, and genetics all play a role in why varicose veins develop in the first place, and that root cause can influence which treatment path makes the most sense long term.

Our vascular team, including Dr. Paul Hanna, evaluates each case individually rather than defaulting to one treatment for every patient. You can learn more about Dr. Hanna’s background in vascular surgery here.

Why Vein Disease Deserves Attention Beyond Appearance

It’s easy to think of varicose veins as purely cosmetic, but they’re often a visible sign of a deeper issue with how blood moves through your legs. Left untreated, vein disease can progress to chronic swelling, skin changes, and in more advanced cases, open sores that are difficult to heal.

Aching, heaviness, and nighttime cramping are common early symptoms that people tend to dismiss as normal fatigue rather than a treatable medical condition. Addressing these symptoms earlier, rather than waiting until veins become more prominent or painful, generally makes treatment simpler and more effective.

Risk factors for vein disease include prolonged standing or sitting, pregnancy, obesity, a family history of varicose veins, and simply getting older, since vein valves naturally weaken over time. None of these factors guarantee you’ll develop problem veins, but knowing your risk can help you catch symptoms early rather than waiting until veins become visibly enlarged. Miami’s warm climate and the amount of time many residents spend on their feet, whether at work or staying active outdoors, can make symptoms feel more noticeable during the summer months.

What Sclerotherapy Costs and What Insurance Covers

Cost is one of the first questions most patients ask, and the honest answer is that it depends on your specific situation. When sclerotherapy is used to treat symptoms like pain, swelling, or skin changes tied to vein disease, it’s often classified as medically necessary and may be covered, at least in part, by insurance. When it’s used purely to improve the cosmetic appearance of spider veins with no underlying symptoms, it’s more commonly treated as an elective, out-of-pocket procedure.

The number of sessions you need also factors into overall cost, since more extensive vein involvement usually means more treatment visits. During your consultation, our team can walk you through what your insurance is likely to cover based on your specific symptoms and vein findings, so you’re not left guessing at what to budget for.

Combining Sclerotherapy With Other Treatments

Many patients don’t need just one type of treatment. It’s common to pair sclerotherapy for smaller surface veins with ablation therapy for a larger underlying vein that’s feeding blood into the smaller ones. Treating the larger source vein first often improves results and reduces how quickly smaller veins reappear afterward.

This is one of the advantages of working with a dedicated vascular surgery team rather than a single-treatment cosmetic clinic. Your provider can build a staged plan, treating the vessels that matter most first and layering in additional sessions as needed, rather than applying the same approach to every patient regardless of what’s actually happening beneath the surface.

Getting Started With Treatment

If you’re considering sclerotherapy, the first step is a consultation where your vascular surgeon examines your veins, discusses your symptoms and goals, and determines whether sclerotherapy or another treatment is the better fit. An ultrasound is often part of this evaluation to check for any underlying valve dysfunction that a visual exam alone can’t detect.

Most patients need more than one session to achieve their desired result, and it’s normal to space these sessions six weeks or so apart to let each round of treatment fully take effect. Setting realistic expectations from the start makes the entire process far less frustrating, and knowing the timeline ahead of time helps you plan around any upcoming events, travel, or beach season without surprises.

If aching, visible veins, or leg heaviness have been bothering you, don’t wait for the problem to become more noticeable or uncomfortable. Our vascular surgery team can walk you through your options and build a treatment plan suited to your veins specifically. Contact us to schedule a consultation.

Frequently Asked Questions

Is sclerotherapy painful?

Most patients describe mild stinging or cramping during the injection rather than significant pain. The needle used is very fine, and any discomfort typically passes within a minute or two per injection.

How many sclerotherapy sessions will I need?

It depends on the number and size of veins being treated. Many patients see the results they want after two to four sessions spaced roughly six weeks apart, though some need fewer or more depending on their veins.

Will my varicose veins come back after sclerotherapy?

A successfully treated vein generally doesn’t return, but sclerotherapy doesn’t stop new varicose veins from forming elsewhere. Many patients return periodically for touch-up treatments over the years.

Can I exercise right after sclerotherapy?

Light walking is encouraged immediately after treatment, but your provider will likely ask you to avoid strenuous exercise for about two weeks while the treated veins heal.

Is sclerotherapy covered by insurance?

Coverage depends on whether the treatment is considered medically necessary, such as for pain or swelling, versus purely cosmetic. Our team can help you understand what your specific insurance plan covers before you begin treatment.

Sources

Mayo Clinic, “Sclerotherapy”

Cleveland Clinic, “Sclerotherapy: Treatment and Recovery”