A baby’s white tongue is related to poor oral hygiene, indigestion and oral candida infection. 1. Poor oral hygiene: If the baby does not pay attention to cleaning the mouth after drinking milk, the food residues will ferment in the mouth and form white tongue coating. 2. Indigestion: Babies with indigestion usually have a white tongue, accompanied by bloating, change in bowel movement, crying and restlessness. 3. Oral Candida infection: Oral Candida infection, often in the tongue to form white material, some in the oral mucosa can also form tofu dregs-like material. The baby’s tongue is white, there are other possibilities, it is recommended to consult a doctor in a timely manner to find the cause, if necessary, with the doctor’s treatment.