Medically Reviewed by Dr Stephen Goode, MBChB, MRCS (Eng), FRCR, PhD
When it comes to removing leg thread veins (also called spider veins or telangiectasia), both ThermaVein and microsclerotherapy offer effective solutions. However, they work differently and are suited to different types of veins. Choosing the right treatment depends on the size, depth, and location of the veins, as well as personal preference. Luckily at HHC Clinics we have both treatment options and so your Endovenous specialist will be able to tackle all thread veins types with these 2 treatment options.
How Each Treatment Works
- ThermaVein (Thermocoagulation): This method uses a high-frequency microwave current delivered through a fine insulated needle. The heat causes the vein to collapse, making it disappear almost instantly. Since no injections or chemicals are used, the process is minimally invasive, with little to no risk of allergic reactions or staining.
- Microsclerotherapy: This involves injecting a special sclerosing solution (such as polidocanol or sodium tetradecyl sulfate) directly into the vein. The solution irritates the vein lining, causing it to stick together and eventually fade as the body absorbs it.
Which Treatment is More Effective for Leg Thread Veins?
1. Size and Depth of Veins
- Microsclerotherapy is generally more effective for leg veins, especially larger ones.
- ThermaVein is best for very fine, superficial leg thread veins that may not be treatable with injections. It’s ideal for tiny capillaries that lasers or injections might miss or are unable to treat.
2. Speed of Results
- ThermaVein offers immediate results, as the vein collapses upon treatment. However, some redness may persist for a few hours or days.
- Microsclerotherapy takes longer to show full effects (typically 4–6 weeks), as the body needs time to absorb the treated vein.
3. Risk of Side Effects
- Microsclerotherapy may cause temporary bruising, pigmentation, or mild swelling at the injection site. There’s also a small risk of matting (the appearance of new tiny veins near the treated area). Staining is also a risk of the procedure, this usually resolves over time but sometime can take 1-2 years to fully fade away. There is a small risk that the skin staining could be permanent.
- ThermaVein has a lower risk of pigmentation changes, but repeated sessions may be needed for optimal results. There is limitations on number of thermavein and time length of treatment sessions.
4. Pain and Discomfort
- Microsclerotherapy involves small injections, which may cause a slight stinging sensation. Most patients tolerate it well.
- ThermaVein produces a mild warming or tingling sensation, but it is generally less painful than injections.
Conclusion
For leg and foot thread veins, microsclerotherapy is usually the preferred treatment, as it effectively treats larger thread veins. However, ThermaVein is a great option for very fine, superficial veins that injections cannot target. In many cases, a combination of both treatments provides the best results. A consultation with you HHC clinics Endovenous specialist can help determine the most suitable approach based on your individual’s vein size and skin type.
📞 Call us today at Nottingham 0115 897 6696 or London 0203 500 4604 or Schedule a Consultation Online to take the first step toward a safe and effective treatment for leg and foot thread veins (spider veins).



