Sclerotherapy is a primary approach for treating the small-vessel varicose disease of lower extremities. It is a procedure used to treat malformations of the blood vessels and the lymphatic system.

Varicose veins are abnormally dilated blood vessels which appear swollen, twisted and can be painful. They occur most commonly in the legs and feet. Spider veins, also known as telangiectasia, are smaller, flat, abnormally dilated visible blood vessels on the skin. These veins appear on the legs and calves and may be blue, purple, or red in colour.

Varicose and spider veins are common in women, and can be a result of pregnancy, trauma, obesity, and standing or sitting for long periods.



Sclerotherapy involves injecting sclerosing solution, directly into the vein using a very fine needle. The procedure takes about 15 to 30 minutes. You may experience a pin prick sensation with mild discomfort and cramping during the injection. The solution irritates the lining of the blood vessel, causing the vein to swell and stick together. Over time, the venous blemishes turn into scar tissue and may disappear.

The number of veins treated in one session will be decided by your doctor based on the size and location of the veins. The first and second treatment will be performed at an interval of two weeks and the response to the therapy will be assessed after a month.

Sclerotherapy slowly clears the veins of your leg. Depending on the size of the blood vessel, the problem is completely resolved in two to six months.



Sclerotherapy may cause certain side effects such as itching, bruising, inflammation, appearance of brown lines, or development of new blood vessels at the site of injection. If the solution is injected into larger veins, the veins may become hard and lumpy. These untoward effects can be treated with a blood release.
Contact your doctor immediately if you notice inflammation, sudden onset of swelling in leg, or ulcers at site of injection.

If you’re looking for effective vein treatments, consider Sclerotherapy. Book an appointment online today.

  • University of Melbourne