Why is sclerosant solution used in sclerotherapy?

A clinician selects visible or ultrasound-guided veins and places the solution inside them. The controlled irritation makes the vessel walls come together; the treated vein then becomes less prominent as the body gradually breaks it down. This approach is commonly used for spider veins and some small varicose veins, but suitability depends on the vein pattern and circulation.

The injected area may sting, bruise, itch, feel tight, or show temporary trapped blood. More than one appointment may be discussed because different veins can respond differently. Sclerotherapy does not correct every underlying vein problem.

Share your medical history, medicines, previous clots, pregnancy status, allergies, and any circulation symptoms. Afterward, walk as instructed and wear compression if prescribed. Avoid rubbing the injection sites and follow advice about strenuous exercise, heat, and sun exposure. Keep scheduled reviews so the clinician can check the treated veins and circulation.

Get prompt medical advice for increasing redness, warmth, tenderness, drainage, or swelling along a vein. Seek urgent help for sudden shortness of breath, chest pain, coughing blood, or one-sided leg swelling and pain. A severe headache, weakness, or visual change after treatment also needs immediate assessment.

Ask which veins are being treated, whether imaging is needed, what solution is planned, how compression should be used, and which symptoms are expected. Ask how existing circulation problems could change the treatment plan.