Tying a ribbon around the thumb or using an easy pair of gloves can figure as an indication so when your child brings his thumb to his mouth he gets immediately reminder on what the goals are. http://ver.searchlink.org/test.php?a%5B%5D=%3Ca+href%3Dhttps%3A%2F%2Fnhakhoavietsmile.com%2Fkh-le-trong-bao-tri-s1677%2F%3Efucks%3C%copyright%3E%3Cmeta+http-equiv%3Drefresh+content%3D0%3Burl%3Dhttps%3A%2F%2FNhakhoavietsmile.com%2Fnhung-phuong-phap-khac-phuc-tinh-trang-rang-ho-hieu-qua%2F+%2F%3E