Sclerotherapy vs Laser for Spider Veins
Sclerotherapy is the first choice for spider veins on the legs. A fine needle puts a solution into the vein and it closes, and the injection also reaches the slightly larger feeder veins that keep spider veins coming back. Surface laser is better for very fine veins and for the face. It works through the skin with no needle, which suits people who cannot face injections. Whichever you have, expect more than one session.
What actually happens
A liquid or foam goes into the vein. It irritates the lining so the vein swells shut, and your body absorbs it over weeks.
A beam passes through the skin. The blood inside the vessel absorbs it and heats up, and that heat damages the vessel wall so it seals.
Which veins it is for
The purple and red lines, plus the slightly larger blue reticular veins under them that supply the pressure.
Threadlike red vessels too small to get a needle into, and veins on the face and around the nose.
The feeder vein problem
A needle can be placed into a reticular vein a few millimetres down and close it. That is why results tend to last.
Surface laser works on what is near the skin. If a feeder vein underneath is still pushing, the fine veins refill.
What it feels like
Each injection stings for a second. Some solutions cause a short cramping ache in the leg afterwards.
Repeated for each pass. Skin is cooled during treatment, and legs hurt more than faces.
How long until you see a change
Treated veins darken, then fade. The final look takes a few months.
Some vessels vanish on the day. Others fade over several weeks or need another pass.
How many visits
Spaced a few weeks apart. Large clusters take more.
Three to six sessions is common for legs, fewer for the face.
Downtime
Compression stockings for a week or two. No gym or long standing for a day or so.
Redness, mild swelling and sometimes small scabs along the treated lines.
The main downside
A brown line can follow the treated vein for months. A fine blush of new tiny vessels can appear nearby. Both usually fade, but not always.
The energy passes through the skin, so it can leave a lighter or darker patch, a small blister, or a fine scab. These usually settle.
Skin tone
The needle does not care what colour your skin is.
Melanin in the skin absorbs some of the light. On tanned or deeper skin the settings must be gentler, and the risk of a pale or dark patch is higher.
Cost
Ask for the cost of the whole plan, not one visit.
Often the more expensive route for legs, because it takes more visits.
The at-home or drugstore version
Compression stockings genuinely help aching legs and slow new veins forming. They do not remove a vein. Creams with horse chestnut or vitamin K may soothe, but nothing you rub on closes a vessel.
Handheld devices sold for veins put a fraction of the energy in, and cannot be aimed at a specific vessel. They mostly heat the skin surface. Burns and pale patches are the usual result.
Who each suits
Why injections are still the first choice for legs
Leg spider veins are usually fed from underneath: The visible red lines sit on top of larger blue reticular veins. Those feeders are what keep refilling the surface.
A needle reaches the feeder. A surface laser does not: That single fact explains most of the difference in results. Treating only what you can see, without closing the supply, gives a good week and a disappointing month.
Sclerotherapy also handles a wider size range: Changing the strength of the solution, or using a foam, lets the same technique treat a threadlike vein and a small ropey one. Laser does well on a narrower band of vessel sizes.
Where the laser wins
Faces are the laser's territory: Injecting the small vessels around the nose and cheeks is awkward, and the skin there marks easily. Light-based treatment is the routine answer for facial redness and broken vessels.
Some leg veins are too fine to inject: Below a certain width you cannot reliably get a needle inside the vessel. Laser is often used to finish off those threadlike leftovers after a course of injections.
And it removes the needle from the conversation: For someone who genuinely cannot tolerate injections, a treatment they will attend beats a better one they will not.
Neither one is finished in a single visit
Both are courses, not appointments: Sclerotherapy usually runs two to four sessions. Laser on legs commonly runs longer. Any clinic quoting one visit for a whole leg is quoting for part of it.
Neither one stops new veins forming: Both treat the veins you have now. Family history, standing work and time keep making new ones, so most people come back for a top-up every year or two.
They are often used together: Injections first to close the feeders and the visible veins, then a laser pass for the fine threads left behind. Doing it the other way round wastes sessions.
Before you book
Ask whether an ultrasound is needed. Aching, swollen, heavy legs point to a larger faulty vein underneath, which is a different treatment.
Ask how many sessions are planned and what the full course costs.
Avoid a tan before laser, and say if you tan easily.
Expect brown lines or bruising for a few months after injections. It is normal and temporary.
