2-year-old baby always spit out his tongue without eating may be related to physiological reasons, but also may be related to mouth ulcers, indigestion and so on. 1. Physiological reasons: such as babies may always spit out their tongues without eating when they are playing and entertaining themselves. 2. Mouth ulcer: It is an ulcerative injury that occurs in the mucous membrane of the mouth. If your baby has mouth ulcers, he or she may not eat because of pain or discomfort. 3. Indigestion: The child may feel full in the stomach after eating a small amount of food, and the appetite disappears, thus appearing to spit out the tongue without eating. If you exclude physiological causes, you should consult a doctor to clarify the specific cause and, if necessary, carry out appropriate treatment.