Methods for treating an undesired varicose or spider vein in a venous system of a patient generally includes substantially emptying the vein of blood between its proximal end and distal end; introducing a medically acceptable adhesive into the substantially emptied vein; and applying pressure to the vein to cause the opposing side walls of the vein to be adhered together in a collapsed configuration by the adhesive. Also disclosed are kits for the treatment of undesired varicose or spider vein in a venous system of a patient. The kits include a medically acceptable adhesive; a cannula; a guide wire; and a catheter.