Sclerotherapy for Spider Veins & Small Varicose Veins
Sclerotherapy is a minimally invasive, in-office procedure used to treat spider veins and small-to-medium varicose veins. It involves injecting a specialized medication (liquid or foam) directly into the affected vein, causing it to collapse and gradually be absorbed by the body. At BASS Vein Center, our board-certified vein specialists perform sclerotherapy with precision using ultrasound guidance when needed. Patients can walk immediately after treatment and typically return to normal activity the same day.
What Is Sclerotherapy?
During sclerotherapy, a sclerosant solution is injected through a very small needle into the diseased vein. The medication irritates the vein lining, causing the walls to stick together and seal shut. Blood is then naturally rerouted to healthier veins nearby.
Over several weeks, the closed vein fades as the body absorbs it.
Sclerotherapy is commonly used to treat:
- Spider veins
- Small varicose veins
- Residual branch veins after other treatments
- Cosmetic vein concerns
It is also effective for reducing symptoms such as:
- Aching
- Burning
- Throbbing
- Leg cramps or heaviness
- Swelling in the lower legs
Risks & Side Effects of Sclerotherapy
Sclerotherapy is considered safe and has been used for decades. Most side effects are mild and temporary, including:
- Bruising
- Small skin sores
- Raised red patches
- Darkened lines or spots
- Clusters of tiny red blood vessels (matting)
Less common but more serious side effects may include:
- Vein inflammation
- Blood clots within the treated vein
- Air bubbles (may cause temporary headache or visual changes)
- Allergic reaction to the solution
Our specialists monitor for these closely and provide aftercare instructions to reduce risks.
Preparing for Sclerotherapy
Before treatment, your vein specialist will:
- Review your medical history
- Check for prior vein treatments
- Ask about heart conditions or history of blood clots
- Review all medications and supplements
- Determine whether underlying venous reflux is present
Be sure to tell your doctor if you take:
- Blood thinners
- Hormonal medications
- Herbal supplements
- Anti-inflammatories
You may be instructed to pause certain medications temporarily before treatment.
What Happens During Sclerotherapy?
Sclerotherapy is performed in-office and does not require anesthesia. Here is what to expect:
- You will recline with your leg slightly elevated
- The skin is cleaned thoroughly
- A very fine needle is used to inject the sclerosant into the vein
- The medication closes the vein from the inside
- A compression stocking or bandage is applied afterward
The session typically lasts 30–60 minutes.
After Treatment
- Walking is encouraged immediately
- Compression stockings must be worn for 1–2 weeks
- Most patients resume normal daily activities right away
- Avoid strenuous exercise for ~2 weeks
Multiple sessions may be recommended depending on the number and size of veins.
Benefits of Sclerotherapy
- Highly effective for spider and small varicose veins
- No anesthesia or downtime
- Minimal discomfort
- Quick in-office procedure
- Improves symptoms and cosmetic appearance
- Proven, long-standing treatment with excellent results
Sclerotherapy in Northern California
BASS Vein Center provides expert sclerotherapy treatment across Walnut Creek, Concord, Antioch, Brentwood, Castro Valley, Alamo, Oakland, Berkeley, and surrounding communities.
Schedule a consultation with an experienced vein specialist today.