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Microsclerotherapy Thread Vein Treatment Guide
What sclerotherapy is, who it suits, what the procedure feels like, and when surgical referral is more appropriate — written by a doctor-led, CQC-registered clinic in Maidenhead.
Book ConsultationBerkshire Aesthetics is a doctor-led, CQC-registered aesthetic clinic in Maidenhead. All treatments begin with a consultation to assess suitability, medical history, risks and realistic outcomes.
Microsclerotherapy is the established first-line treatment for visible thread veins (telangiectasia) and spider veins on the legs. A tiny volume of sclerosant solution is injected directly into each vein through a very fine needle, causing the vein lining to inflame, close and gradually fade as the body absorbs it over the following weeks.
At Berkshire Aesthetics this is delivered as a medical, doctor-led procedure. We assess for underlying venous reflux before treating surface vessels, because thread veins are sometimes a downstream sign of larger vein problems that need addressing first.
This guide explains who microsclerotherapy is suitable for, what the procedure feels like, what the realistic results are, when we refer to a vascular specialist instead, and how it compares with laser vein treatment. For pricing and to book, see our microsclerotherapy treatment page.
Who Microsclerotherapy Is Usually For
- Telangiectasia (thread veins) on the lower legs, behind the knees and on the thighs
- Spider veins and reticular feeder veins under 3 mm in diameter
- Patients who have completed any necessary vascular assessment ruling out underlying venous reflux
- Adults who can tolerate compression hosiery for the recommended post-treatment period
- Patients without contraindications such as pregnancy, immobility, recent DVT or active infection
When We Don't Recommend Microsclerotherapy
- Larger varicose veins (>3–4 mm) where vascular ultrasound assessment may indicate alternative management
- Truncal venous reflux (often felt as aching, heaviness, swelling) — needs a vascular specialist referral first
- Active deep vein thrombosis, recent surgery or immobility
- Known hypersensitivity to sclerosants
- Pregnancy or breastfeeding
Before Treatment: Why The Assessment Matters
Thread veins look superficial, but they can be the visible end of a deeper venous problem. Treating the surface while leaving underlying reflux untouched leads to early recurrence and disappointment. At your first consultation we:
- Take a focused vein history — family history, pregnancies, hormonal contraception, occupation, prior DVT, symptoms of heaviness or aching
- Examine the legs for signs of varicose veins, skin changes or chronic venous insufficiency
- Refer for duplex ultrasound assessment where indicated — usually before any cosmetic treatment of thread veins
- Confirm contraindications are not present (pregnancy, allergy, immobility, active infection)
- Walk through realistic numbers of sessions and likely cost based on density of veins present
If we think a vascular surgeon should see you first, we will say so — even where that delays the cosmetic outcome you came in for.
What Happens During The Procedure
- You sit or lie on the treatment couch with the area of leg being treated exposed; the skin is cleaned with an antiseptic.
- Using a very fine needle (typically 30G), small volumes of sclerosant solution are injected directly into each visible vein.
- Each injection takes a few seconds. Most patients describe a brief stinging or cramping sensation that settles immediately.
- Treated veins commonly look more prominent or darker before they fade — this is part of the normal vessel-closure response, not a complication.
- A session takes 20–40 minutes depending on density of veins.
- Graduated compression stockings are applied before you leave. You walk normally on the day.
No general or local anaesthesia is used. You can drive yourself home and return to most routine activities the same day.
Recovery and Aftercare
- Wear graduated compression hosiery day and night for the first 24–48 hours, then daytime only for one to two weeks.
- Walk regularly — short, frequent walks help post-treatment.
- Avoid hot baths, saunas, steam rooms and strenuous exercise for the first 48 hours.
- Avoid long-haul flights or prolonged immobility for at least two weeks where possible — flag any unavoidable travel at consultation.
- Expect bruising, mild itching and a darkening of treated veins; these settle over weeks.
- Use sun protection on treated areas — UV exposure during the resolution phase can lead to temporary brown pigmentation along treated vein lines.
Results Timeline: What To Expect Week By Week
Day 0–7: Treated veins may look darker and more prominent. Small bruises around injection points are normal. Compression stockings worn day and night for the first 24–48 hours.
Week 1–4: The body begins to absorb the closed vessel. Treated lines gradually fade. Some patients see mild brown pigmentation along treated tracks — usually temporary.
Week 4–8: Most of the fade has occurred for that round of treatment. We review at six to eight weeks before deciding whether a second session is needed.
Beyond 8 weeks: Residual pigmentation can take several months to fully resolve. New thread veins are not prevented; we talk through realistic maintenance expectations at the review appointment.
Microsclerotherapy vs Laser Vein Treatment
On the legs, microsclerotherapy is generally the more effective option for thread veins and spider veins, because the sclerosant reaches the vein lining directly through cannulation. Laser energy has to pass through skin and competing tissues to reach the vessel, which is less efficient at the depths and vessel calibres found in the legs.
We may use a vascular laser such as the Cutera Excel V+ or the Lumenis M22 IPL for facial thread veins — different anatomy, different physics — or for very fine leg vessels too small to cannulate. The choice is based on what works best for the specific vessel, not what is on offer.
Microsclerotherapy FAQs
- How does microsclerotherapy work?
- A very fine needle is used to inject a small volume of sclerosant solution directly into each visible thread vein. The sclerosant irritates the inner lining of the vein, causing the vein walls to swell and stick together. Over the following weeks the body absorbs and clears the closed vessel, and the surface vein gradually fades.
- Does microsclerotherapy hurt?
- Most patients describe a mild stinging or cramping sensation that lasts a few seconds per injection. No anaesthetic is required. The needle is finer than the one used for routine blood draws. Patients with a low pain threshold may find more extensive sessions less comfortable, and we adjust pace accordingly.
- How many sessions of microsclerotherapy will I need?
- Most patients require one to three sessions spaced four to six weeks apart. Density of veins, response to treatment and whether feeder veins need to be addressed first all affect the total session count. We do not promise clearance in one session — that would be misleading for most realistic cases.
- How long do microsclerotherapy results take to show?
- The treated veins typically darken and then fade over four to twelve weeks. Some patients see a faster response and some take longer; pigmented marks ("matting") can occasionally linger for several months before resolving. We review at six to eight weeks before planning further sessions.
- Are microsclerotherapy results permanent?
- Treated veins are permanently sealed and do not re-open. However, microsclerotherapy does not prevent new thread veins from developing, which is common in patients with a genetic predisposition or ongoing risk factors (pregnancy, hormonal changes, prolonged standing). Many patients return for maintenance sessions every one to three years.
- Microsclerotherapy vs laser vein removal — which is better for legs?
- Microsclerotherapy is the established first-line treatment for leg thread veins and is generally more effective than laser for vessels of this size and depth on the legs. Laser vein removal (e.g. Cutera Excel V+) is more often used for facial vessels and for selected leg veins that are too fine for cannulation. We choose based on vessel size, depth and pattern, not on what we happen to own.
- Will I need compression stockings after microsclerotherapy?
- Yes. Graduated compression hosiery is worn for typically one to two weeks following treatment, day and night for the first 24–48 hours and then daytime only. Compression supports the treated vein, reduces the chance of matting and improves the cosmetic result.
- When is microsclerotherapy not the right treatment?
- If you have aching, heaviness, swelling, skin changes around the ankles or a personal/family history of varicose veins, your veins may have an underlying venous reflux component. In that case we will refer you for a duplex ultrasound assessment before considering surgical management of the trunk veins, treating thread veins on top last — not first.
- How much does microsclerotherapy cost in Maidenhead?
- At Berkshire Aesthetics microsclerotherapy starts at £350 per session. Final cost depends on number of veins, session length and total sessions required, which is confirmed at consultation. We do not quote a fixed total before assessment because doing so would be misleading for many patients.
- What are the risks of microsclerotherapy?
- Most patients experience some bruising, mild itching or temporary brown pigmentation along the treated vein, which resolves over weeks to months. Rare risks include matting (a fine reddened network where treated veins were), persistent pigmentation, skin ulceration at the injection site, and very rarely allergic reaction to the sclerosant or deep vein thrombosis. We discuss these in detail at consultation and obtain written informed consent.
Why we start with a consultation
Every treatment begins with a medical assessment. We need to understand your medical history, current health, skin condition and concerns before prescribing any procedure. This protects your safety and ensures the treatment is clinically appropriate for you.
During your consultation, your clinician will explain what the treatment can realistically achieve, any risks specific to you, and whether an alternative might be more appropriate. Consultations are carried out by our doctors or advanced aesthetic practitioners, depending on the treatment or concern being assessed.
All bookings are subject to our Booking Conditions.
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Start free skin analysis →This content is for informational purposes only and does not constitute medical advice. Individual suitability for any treatment is assessed during a consultation. Always seek the guidance of a qualified medical professional with any questions regarding a medical condition or treatment.
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