Sclerotherapy is a procedure whereby a special chemical is injected into the tiny violet veins and the slightly larger blue veins on the legs and thighs. This chemical reacts with the veins to ‘glue’ the insides together and clot the blood in them . The vein closes down and the body clears the broken down vein over the next few weeks.

The most common reason for seeking to remove spider veins is to improve the appearance. However, these veins can also cause symptoms such as pain, bruising or itching, night cramps and tiredness of the legs. Sclerotherapy may help to improve all of the above.

The chemical is injected along the vein at different points with the person lying down. Very fine needles are used, and the chemical itself has an anaesthetic effect so the procedure is practically painless. Only a slight pinching sensation may be felt for a few seconds after injection. The procedure lasts for 45 to 60 minutes. The person is awake throughout, and can walk away straight after.