Spider veins are dilated veins directly beneath the surface of the skin. They appear as reddish, bluish, or violet vessel patterns and occur mainly on the legs.

In most cases, spider veins are harmless. However, they can indicate underlying venous insufficiency or varicose vein disease. That is why a vascular medicine examination by a specialist is recommended before treatment.

Spider veins affect very small, superficial vessels. Varicose veins are significantly larger veins that are dilated and often tortuous. Both changes can occur independently, but they often occur together.

The causes are varied. A family predisposition can play a role, as can hormonal changes, pregnancy, prolonged sitting or standing, and weakness of the venous system.

As a rule, spider veins persist. Without appropriate treatment, they usually do not recede. Over time, additional vessels may appear.

First, a clinical examination of the legs is performed. Depending on the findings, we also carry out a duplex ultrasound examination at Derma Medical Clinic in Zurich to assess the superficial and deep venous system.

In sclerotherapy, a special medication is injected into the affected vessels. This causes the vessel walls to stick together, and the treated vein is gradually metabolised by the body.

Most patients find the treatment well tolerated and not painful. During the injection, a brief burning sensation or slight feeling of pressure may occur.

Both procedures pursue the same goal—closing the affected vessels—but they target different vessel sizes. The Nd:YAG laser is particularly suitable for the finest, superficial spider veins, while sclerotherapy (injection treatment) is more commonly used for larger, net-like veins and reticular veins. Which method—or a combination of both—is right for you is decided individually together with you, based on your skin type, findings, and your preferences.

The number of treatments depends on the amount, size, and extent of the spider veins. Several sessions are often necessary.

The treated vessels do not disappear immediately. The body breaks them down gradually. Initial changes can be seen after a few weeks; complete regression may take several months.

Your skin should not be tanned at the treatment appointment. Direct sun exposure or solarium visits should be avoided starting two weeks before treatment.

Treated vessels usually disappear permanently. New spider veins can develop over time in other areas if the predisposition persists.

Depending on the method, wearing compression stockings for a few days may be useful. Unlike sclerotherapy, no compression stocking is required after laser treatment. Redness and mild swelling are normal and can be covered with sunscreen make-up if needed.

You are fit to socialise again immediately after the session. The treatment is performed on an outpatient basis. Mild redness, small bruises, or temporary discolouration may occur, but in most cases they do not restrict everyday life.

Light activity such as walking is usually unproblematic. You should avoid intense exercise, sauna, hot baths, or strong heat exposure for 48 hours.

In the first 48 hours after treatment, you should avoid sports and sauna. For four weeks after treatment, direct sun exposure should be avoided; otherwise, consistent sun protection with SPF 50 is necessary, as treated areas may otherwise be prone to pigment changes.

Spider veins occur more frequently in women, but they can also develop in men and can be treated just as effectively.

An examination is advisable if spider veins are new, spread quickly, or if additional symptoms such as a feeling of heaviness, swelling, tightness, or visible varicose veins are present. Early assessment helps to identify possible changes in the venous system in good time.