THE MOUTH
The tongue of newborn infants is generally whitish and continues to be so until the saliva becomes plentiful. After this we usually find it coated in disturbances of the stomach and bowels and in nearly any disorder accompanied by fever. In scarlet fever the tongue becomes bright red after a few days, and in measles and whooping cough it is often faintly bluish. In the latter affection an ulcer may sometimes be found directly under the tongue, where the thin membrane binds it to the floor of the mouth. In thrush the tongue is covered with white patches like curdled milk. A pale, flabby tongue, marked by the teeth at its edges, indicates debility or impaired digestion. In prolonged or very high fever the tongue grows dry, and in some diseases of the stomach or bowels it may look like raw beef.
Grinding of the teeth is a frequent symptom in infants in whom dentition has commenced. It generally indicates an irritated nervous system. Most often this depends upon some disturbance of digestion; less often upon the presence of worms. The symptom is present during or preceding a convulsion, and may occur, too, in disease of the brain. In some babies it appears to be only a nervous habit.