Yellow Layer
Another common issue with the tongue is a color change to yellow. In most cases, it is caused by the overgrowth of bacteria from foods. You can simply remove it by cleaning the tongue on a daily basis and practice proper oral hygiene. If the layer is thick, it can be a result of a bacterial overload or body overheating. Some common causes of bacterial overload in the tongue include jaundice, psoriasis, taking vitamins, chewing tobacco products, smoking, as well as fever. Since there are many factors associated with a yellow coating on the tongue, it is better to seek medical advice from your doctor to find out any abnormal changes. [7]
