Complications of Sclerotherapy

Sclerotherapy is a very safe and effective treatment for thread veins, but like all medical procedures, it carries some potential risks and side effects. Most are mild and temporary, but it is important to understand them before treatment.

Bruising

Bruising is common after sclerotherapy and usually settles within a few weeks. It is caused by minor leakage of blood from the treated veins and is more noticeable in people who bruise easily.

Pigmentation

Brown pigmentation can occur along the line of the treated vein. This is due to iron from the blood being deposited in the skin. It usually fades over several months but may occasionally take longer.

Matting

Matting refers to the appearance of fine, reddish veins around the treated area. It is more common in people with fair or sensitive skin and may require further treatment if it persists.

Allergic Reactions

Allergic reactions to the sclerosant are extremely rare. When they do occur, they are usually mild and respond well to treatment. Severe reactions are exceptionally uncommon.

Skin Ulceration

Very rarely, a small ulcer can form at the injection site if the solution enters the surrounding tissue. This may take a few weeks to heal and can leave a small scar.

Deep Vein Thrombosis (DVT)

DVT is extremely rare following sclerotherapy for thread veins. The risk is higher in patients with underlying varicose veins, which is why a duplex scan is essential before treatment.