What Is Sclerotherapy?

 

Sclerotherapy is a minimally invasive medical treatment used to reduce the appearance of spider veins, reticular veins, and small varicose veins. During treatment, a specialized solution called a sclerosant is injected directly into the targeted vein. This solution irritates the inner lining of the vessel, causing the vein to close. Over time, the treated vein is naturally absorbed by the body and blood flow is redirected through healthier surrounding veins.

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Sclerotherapy has been used for decades and remains one of the most established treatments for superficial leg veins, especially spider veins and smaller visible veins.

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How Sclerotherapy Works

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The goal of sclerotherapy is to close unwanted superficial veins so they gradually fade from view. The injected sclerosant creates a controlled reaction inside the vein wall, causing the vessel to collapse and seal. Once closed, the body gradually breaks down and reabsorbs the treated vein.

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Because these treated veins are superficial, circulation naturally redirects through deeper, healthier veins. This is why sclerotherapy can improve cosmetic vein visibility without compromising healthy circulation when performed appropriately.

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What Sclerotherapy Treats

 

Sclerotherapy may be used to treat:

• Spider veins

• Small varicose veins

• Reticular veins

• Visible superficial leg veins

• Cosmetic vein concerns

• Mild vein-related discoloration

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Spider veins and reticular veins are commonly treated with injected sclerosants, and medical sources describe sclerotherapy as a first-line treatment for spider veins on the legs.

 

Expected Results Timeline

 

Results are gradual. Small spider veins may begin to fade within 3 to 6 weeks, while larger veins may take 3 to 4 months to show improvement. Some patients require more than one session depending on the number, size, and severity of the veins being treated.

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This is why sclerotherapy is best understood as a progressive treatment rather than an instant cosmetic correction.

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Why Multiple Sessions May Be Needed

 

The number of sessions depends on:

• The size of the veins

• The number of veins being treated

• The location of the veins

• How the veins respond to treatment

• Whether new veins develop over time​

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Downtime & Recovery

 

Sclerotherapy is generally performed in-office and usually involves minimal downtime. Many patients return to normal activities quickly, although walking is often encouraged after treatment to support circulation.

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Temporary side effects may include:

• Mild bruising

• Tenderness

• Redness

• Temporary discoloration

• Small raised areas near injection sites

• Minor stinging or sensitivity

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These effects are usually temporary and part of the normal healing response.

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Compression & Aftercare

 

Compression garments may be recommended after treatment to support circulation and healing. Compression helps improve blood flow in the lower legs and may reduce pooling or swelling.

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Patients may also be advised to:

1. Walk regularly

2. Avoid strenuous lower-body exercise temporarily

3. Avoid prolonged standing immediately after treatment

4. Avoid excess heat exposure

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Follow provider-specific aftercare instructions.

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Lifestyle Factors That Support Vein Health

& Safety Considerations

 

Healthy circulation can support long-term results. Movement, exercise, weight management, leg elevation, and avoiding prolonged sitting or standing may help reduce the risk of future vein concerns. 

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Sclerotherapy is widely used, but it is still a medical procedure and requires proper assessment. A consultation is important to determine whether the visible veins are appropriate for treatment and whether ultrasound or further evaluation is needed.

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Sclerotherapy may not be appropriate for everyone, including some individuals who are pregnant, have certain clotting risks, active infections, or specific vascular concerns. A trained provider should assess candidacy before treatment.

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Important Disclaimer

 

Results shown throughout this website are for visual inspiration only and may not reflect individual treatment outcomes. Every patient’s vascular anatomy, vein severity, circulation, genetics, lifestyle, and response to treatment are unique. Results vary, and multiple sessions may be recommended.

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This content is for educational purposes only and does not replace a medical consultation.

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Clinical References

 

Mayo Clinic.
Sclerotherapy.
https://www.mayoclinic.org/tests-procedures/sclerotherapy/about/pac-20384592

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Cleveland Clinic.
Sclerotherapy: Treatment & Recovery.
https://my.clevelandclinic.org/health/treatments/6763-sclerotherapy

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Beneat A, et al.
Sclerotherapy — StatPearls — NCBI Bookshelf.
National Center for Biotechnology Information.
https://www.ncbi.nlm.nih.gov/books/NBK599526/

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Sandean DP, et al.
Spider Veins — StatPearls — NCBI Bookshelf.
National Center for Biotechnology Information.
https://www.ncbi.nlm.nih.gov/books/NBK563218/

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Rabe E, et al.
Sclerotherapy in the Treatment of Varicose Veins.
Phlebology / PMC.
https://pmc.ncbi.nlm.nih.gov/articles/PMC8692296/