The Varicose Veins Treatment In India with foam, also known as foam sclerotherapy, is effective for small-caliber varicose veins, being more customized for spider veins and micro-varicose veins. The foam is a mixture of carbon dioxide gas and a liquid, which together are applied directly to the varicose veins, closing the vein. The foam treatment is practically definitive, and after the procedure, it is recommended to use compression stockings to improve circulation and reduce the chances of the varicose veins reappearing. See how foam sclerotherapy is done.