White and thick tongue in breastfed babies is usually considered to be caused by residual milk stains and fire in the child. It is recommended to use a clean gauze dipped in warm water or saline to help clean the child’s mouth, including the gums and tongue, every day. It is usually necessary to clean 1-2 times a day and the symptoms will gradually improve after a period of time. Breastfeeding mothers should also make adjustments in their diet, with a good mix of meat and vegetables, reasonable nutrition, and more vegetables and fruits. Avoid eating too greasy, but easy to cause the baby on fire. You should usually give your child more sunshine and regular supplementation of vitamin AD drops. It can effectively promote the absorption of calcium and help the child grow healthily, which is very beneficial to the child.