Baby finger eating may be caused by congenital conditioned reflexes, self-indulgent ways and other reasons. 1. Innate conditioned reflex: baby love to eat fingers, can be called sucking reflex, is a kind of innate conditioned reflex, is a normal physiological phenomenon, parents do not have to worry too much. 2. Self-indulgence: generally when babies begin to be conscious of their own limbs in the process of growing up, eating fingers is a new skill for them, which can increase the fun and comfort themselves, belonging to a kind of self-healing. Baby finger eating may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.