Generally speaking, if a child’s tongue is yellow and thick, he or she may have eaten food that is easily inflammable, or there may be bacterial infection on the tongue, or there may be pigmentation from food deposited on it. First of all, we should carry out effective cleaning, dental cleaning is the first aspect, and secondly, you can choose the back of the tongue brush, the tongue coating for cleaning, and observe whether there is still yellow, thick situation. If the above situation still occurs, you may need to choose a specialized dental hospital for consultation and treatment, so as not to jeopardize the health of the body, not conducive to the healthy growth of children.