Superior portal vein force. The risk of bleeding increases given that the strain within the portal vein improves. Sclerotherapy requires using a needle To place a solution into the vein. The sclerotherapy Alternative causes the vein to scar. The scarring forces blood via healthier veins. The varicose vein then fades. https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-answers-to-your-most-common-questions/