In the vast majority of cases, one-month-old infants do not need to have their tongues washed. Although some parents may observe that a one-month-old baby’s tongue is very thick and greasy, often white in color, this is mostly a physiological phenomenon, as a one-month-old baby’s diet is based on breast milk or infant formula. At this time, the children’s tongue will normally be white and greasy, as long as the children do not have abdominal distension, abdominal pain, vomiting and other symptoms, there is no need to deal with this time, there is no need to wash the tongue. Even if a child’s tongue appears thick and greasy, yellowish in color and other symptoms of indigestion, there is no need to wash the tongue at this time.