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A medical procedure called sclerotherapy is used to treat spider and varicose veins, which are typically found on the legs. The doctor will inject a specific solution into your spider or varicose vein using a needle. The lining of your blood vessels becomes irritated by this chemical solution, which causes it to swell, adhere, and leave a scar. Your vein is sealed off, improving both its appearance and sensation.
Spider veins also known as telangiectasias, are inflamed blood vessels that appear red, blue, or purple immediately beneath the skin. They are usually not harmful. Although they rarely occur, spider veins can occasionally cause burning, itching, or discomfort (particularly in your legs). Spider veins can be removed, and treatments can improve your skin's appearance.
What are the types of Sclerotherapy?
The most common type of sclerotherapy is called liquid sclerotherapy, in which a tiny needle is used to inject a liquid chemical solution, or sclerosant, directly into the vein. The vascular lining becomes irritated by the sclerosant, which makes it expand and adhere. The vein eventually becomes fading scar tissue.
The size and location of the veins, the patient's general health, and the doctor's experience all play a role in the sclerotherapy procedure selection.
Who needs Sclerotherapy?
People with spider veins or varicose veins may benefit from sclerosing their veins, but not everyone is an ideal candidate. You will consult with a vascular specialist before the treatment, who will determine your eligibility for sclerotherapy.
Sclerotherapy is not often performed on veins that you may require in the future for surgical bypass treatments, such as the saphenous vein used in coronary artery bypass graft surgery unless the vein is already damaged beyond repair.
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Alvina Hasan is a dedicated medical researcher and scientific writer with a strong foundation in pharmaceutical sciences. She holds a B.Pharm from Jamia Hamdard University and an M.Pharm in Quality Assurance from DIPSAR University.
With deep medical expertise and a strong interest in healthcare communication, she focuses on transforming complex clinical and scientific information into clear, engaging, and easy-to-understand narratives. She develops insightful healthcare articles and research-driven content designed to support both medical professionals and patients, helping bridge the gap between advanced medical knowledge and practical understanding.
Readers can explore her published research and articles here:
https://carcinogenesis.com/index.php/JOC/article/view/868
https://carcinogenesis.com/index.php/JOC/article/view/870
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General & Laparoscopic Surgeon
33 Years of Experience
Dr. Pradeep Jain has completed his MBBS, MS - General Surgery, MCh - Surgical Gastroenterology/G.I. Surgery, and MCh - Surgical Oncology. He is a GastroIntestinal Surgeon, General Surgeon, Surgical Oncologist, Bariatric Surgeon par excellence with total experience of 36 years of which about 33+ years have been as a specialist View More
Last Reviewed - January 2026