If you have tongue cuts, make sure you rinse your mouth after every meal. You can use popularly available mouth wash to avoid infection. Supplement your diet with vitamins.
Cuts on the tongue typically heal very quickly due the large amount of blood vessels in the mouth. To expedite healing, keep the cut as clean as possible by swishing with salt water or antiseptic mouth rinse.
The tongue generally heals fairly quickly on its own. Avoid hot beverages and soups, as well as salty and spicy foods as those will irritate the injured area of the tongue.