Bruising After Sclerotherapy: What's Normal and How Long It Lasts

If you've recently had sclerotherapy for spider veins, reticular veins or varicose veins, some bruising after sclerotherapy is one of the most common things patients notice in the days that follow. For most people, it's a completely normal part of healing and nothing to worry about. But bruising isn't the only mark you might see. Many patients also develop brownish lines or patches over the treated veins, a separate effect called post-sclerotherapy pigmentation, which behaves quite differently from an ordinary bruise and can take much longer to settle. This guide explains what's happening under the skin, how long bruising and brown marks typically take to fade, and the simple aftercare steps that help your legs heal well.

Why Do You Get Bruising and Brown Marks After Sclerotherapy?

During sclerotherapy, a solution is injected into the vein to irritate its lining, causing it to close down and eventually be reabsorbed by the body. That process inevitably disturbs some of the smaller blood vessels around the injection sites, and two separate things can then happen in the skin.

Ordinary bruising :

Some blood leaks from the tiny capillaries damaged during the injection and pools just under the skin. This is the same mechanism behind any everyday bruise, whether from a bump or a blood test. It starts reddish purple, moves through blue and green, and fades to yellow before disappearing, generally within one to two weeks.

Hemosiderin staining (the brown marks) :

The longer lasting brown lines or patches that follow the path of the treated vein are a different process altogether. When red blood cells break down in the tissue near the treated vein, they release iron in the form of a pigment called hemosiderin. This pigment deposits in the skin and produces a tan, brown or sometimes grey brown discolouration that traces the vein. Because hemosiderin sits deeper in the tissue and the body clears it slowly, this pigmentation after sclerotherapy can persist for months after the original bruising has gone. It's a well recognised and expected side effect of sclerotherapy, not a sign that anything has gone wrong with your treatment.

Bruising vs Brown Marks: What's the Difference?

Patients often search for pictures of bruising after sclerotherapy because they're trying to work out whether what they're looking at on their own leg is a normal bruise or the longer lasting staining. A few practical differences to look for:

• Colour: A bruise moves through purple, blue, green and yellow. Hemosiderin staining tends to stay a fairly flat tan or brown, sometimes with a faint golden tinge.

• Shape: Bruising is often a diffuse, blotchy patch around the injection point. Staining more often traces the thread-like line of the treated vein itself.

• Timing: Bruising is at its worst in the first few days and fades steadily from there. Brown staining is often not very visible in the first week or two, then becomes more obvious as the initial bruising clears and the pigment underneath is revealed.

• Duration: Bruising is measured in days to a couple of weeks. Staining is measured in months, and occasionally longer.

If you're ever unsure which one you're looking at, a photo sent to the clinic or a check at a follow-up appointment is far more reliable than comparing your leg to photos online, since skin tone, vein size and lighting all change how these marks appear from person to person.

How Long Does Bruising Last After Sclerotherapy?

This is the question we're asked most often, and the honest answer depends on what you're looking at.

• Bruising: typically fades within one to two weeks. Larger or deeper veins, and areas that received more than one injection, may take a little longer.

• Redness and mild swelling: around injection sites usually settles within a few days

• Brown marks (hemosiderin staining): generally start to soften after four to six weeks, with visible fading over three to six months. Most cases resolve within twelve months.

• Persistent staining: According to the Better Health Channel, Victoria's government health information service, brown lines following sclerotherapy disappear in most people, but in fewer than five per cent of patients they can last a year or longer. In a small number of cases, faint staining may be permanent, particularly where treatment involved larger veins or where more pigment was deposited.

• Trapped blood and lumps: Firm lumps can sometimes form where blood has collected inside a treated vein rather than being reabsorbed. These usually soften over several weeks, and having the trapped blood drained at a follow-up visit can sometimes speed up fading of the overlying discolouration too.

As a rough rule of thumb: bruising is a matter of weeks, brown staining is a matter of months, and only a small minority of patients see marks stretch beyond a year.

What's Normal, and When Should You Call the Clinic?

Sclerotherapy has a well established safety record, and most side effects are cosmetic and temporary. Still, it's worth knowing what falls inside the range of normal post sclerotherapy care and what doesn't.

Generally expected: bruising and mild tenderness around injection sites, a feeling of tightness or firmness along the treated vein, brown or tan discolouration developing over the following weeks, and small, fine red vessels appearing near the treated area that usually settle within a few months.

Worth a call to the clinic: increasing pain, redness or warmth in the leg that's spreading rather than settling, swelling in the calf or ankle that doesn't improve with elevation, a hard tender cord forming along a larger vein, any skin breakdown, blistering or an open sore over an injection site, or sudden shortness of breath or chest pain, which needs urgent medical attention rather than a routine call.

This is general information, not a diagnosis. If anything about your recovery feels wrong to you, it's always reasonable to have it checked by a doctor rather than wait it out. You're welcome to contact us if you'd like a nurse or doctor to take a look, and our FAQs about leg vein treatments cover more general recovery questions.

Post Sclerotherapy Care: Aftercare Tips That Help

There's no way to guarantee you won't bruise or stain at all, since it comes down largely to your individual skin and vein anatomy. But good aftercare genuinely does reduce the severity and helps marks fade faster.

• Wear your compression stockings: Keeping firm, even pressure on the treated veins helps stop blood pooling under the skin, reducing both bruising and the amount of hemosiderin deposited. Wear stockings for the length of time recommended for your treatment, typically ranging from several days for small veins up to a few weeks for larger ones.

• Keep moving: Gentle walking on the day of treatment and in the days after encourages healthy blood flow through the deeper leg veins. Avoid long periods sitting or standing still, especially in the first 24 to 48 hours.

• Protect treated areas from the sun: Sun exposure on treated skin can darken hemosiderin staining and make it take longer to fade. Keep treated areas covered or well protected with sunscreen for at least a few weeks, ideally until the marks have settled.

• Avoid hot baths, saunas and spas short term: Heat dilates blood vessels and can increase bruising and swelling. Stick to lukewarm or cool showers for the first couple of days, and hold off on hot baths, spas, saunas and heat packs on treated legs for at least one to two weeks.

• Be cautious with blood thinning medications and supplements: Aspirin, anti-inflammatory medications, fish oil and some herbal supplements can all increase bruising. Never stop a prescribed medication without medical advice, but mention everything you're taking so your doctor can advise on timing around your appointment.

• Go easy on iron supplements: Because the brown marks are caused by iron pigment released from blood cells, it's sensible to avoid iron supplements around the time of treatment unless they're medically necessary.

• Don't pick at bruised or lumpy areas: Let your doctor guide any massage or drainage of trapped blood rather than doing it yourself.

Will the Brown Marks Fade Completely? What Affects the Outcome

Most patients see their brown marks fade to the point of being barely noticeable, but a few factors influence how quickly and how completely: skin tone (staining is more visible against fair skin, though it can occur in any skin type, and in deeper skin tones marks can sometimes take longer to fade), vein size and depth (larger, more superficial veins tend to leak more red blood cells during treatment, meaning more hemosiderin and a longer fading time compared with fine spider veins), sun exposure (UV exposure on treated skin darkens staining and slows fading), and number of treatment sessions (veins sometimes need more than one session to fully close, so total fading time is often measured from your last session rather than your first).

The precision of the injection also influences how much local tissue reaction occurs, which is one reason ultrasound guided sclerotherapy is often used for larger or deeper veins not visible from the surface, since it allows more accurate placement of the injection. Fine surface veins are usually treated with straightforward surface sclerotherapy instead. In the rare cases where staining doesn't fully resolve, options such as targeted laser treatment can be discussed with your doctor, though results vary and aren't guaranteed.

A Realistic Timeline at a Glance

• Days 1-3: Redness, mild swelling and early bruising at injection sites

• Week 1-2: Bruising colour changes and mostly fades

• Week 2-6: Brown or tan staining becomes more visible as bruising clears

• Month 3-6: Noticeable fading of hemosiderin staining for most patients

• Month 6-12: Staining continues to lighten; most cases have resolved or are close to resolved

• Beyond 12 months: A small minority of patients, under five per cent according to the Better Health Channel, have staining that persists longer, and a small number of cases may not fully resolve

Every leg is different, and this timeline is a general guide rather than a promise about your own healing.

Frequently Asked Questions:

How long does bruising last after sclerotherapy?

Ordinary bruising from the injections themselves usually fades within one to two weeks. The separate brown staining that can follow, caused by hemosiderin pigment, takes much longer, often three to six months, and occasionally up to a year. If your bruising after sclerotherapy hasn't started improving within two to three weeks, it's worth having it checked.

Are brown marks after sclerotherapy permanent?

For most patients, no. The marks fade gradually over several months as the body clears the hemosiderin pigment. In a small percentage of cases, faint discolouration can persist beyond a year, and rarely it may not fully resolve. Your doctor can advise on further options if staining hasn't improved after twelve months.

Is it normal to have both bruising and brown marks at the same time?

Yes. It's common to have fresh bruising in the first couple of weeks while the deeper brown staining is only just becoming visible. They're two separate effects with different timelines, which is why the leg can look like it's getting worse before the bruising resolves, even though the overall healing process is on track.

What can I do to stop brown marks from getting worse?

The main things within your control are wearing your compression stockings as directed, protecting treated areas from sun exposure, staying active, and avoiding hot baths and saunas for the first week or two. None of these can guarantee you won't stain, since your skin and vein anatomy play a large role, but they do reduce the risk of more pronounced marks.

Should I be worried if my bruise looks worse than photos I've seen online of bruising after sclerotherapy?

Comparing your leg to pictures of bruising after sclerotherapy online isn't a reliable way to judge your own recovery, since lighting, skin tone and vein size all affect how bruising looks in photos. If you're concerned, particularly about pain, spreading redness, swelling or a hard tender lump, contact the clinic so a doctor can assess it directly.

Does the type of sclerotherapy affect how much bruising or staining I get?

It can. Surface sclerotherapy for fine spider veins tends to involve less tissue disturbance than ultrasound guided sclerotherapy used for larger or deeper veins, which can mean a difference in the amount of bruising or staining. Your doctor will talk you through what to expect based on the specific veins being treated.

Conclusion

Bruising after sclerotherapy, and the brown marks that can follow it, are a normal and expected part of recovering from this treatment for most patients. Bruising typically settles within one to two weeks, while hemosiderin staining takes longer, often several months, and only rarely persists beyond a year. Following simple aftercare steps, wearing your compression stockings, staying active, protecting treated skin from the sun and avoiding heat in the short term, gives your legs the best chance of a smooth recovery. If anything about your healing feels different from what you'd expect, or you'd like your legs assessed in person, our doctors at Melbourne Leg Vein Centre are here to help. You can book a consultation to have your recovery reviewed and discuss next steps.