Allergic response. An allergic reaction to the answer employed for treatment can be done but unusual. Mayo Clinic offers a comprehensive choice of treatment choices for varicose veins, like liquid and foam sclerotherapy, endovenous thermal and nonthermal ablation, ambulatory phlebectomy, and — sometimes — surgical ligation and removal of veins. https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-a-comprehensive-guide/