Baby drooling is not necessarily a zinc deficiency, mostly considered physiological factors, oral ulcers, cerebral palsy and so on. 1. baby drooling is mostly considered physiological factors, baby salivary glands developed, shallow lips, swallowing function development delay, often drooling, especially the emergence of teeth, the symptoms are aggravated. 2. Babies with oral ulcers stimulated by pain will drool a lot, but also manifested as refusal to eat, crying. Zinc deficiency may cause recurrent mouth ulcers and painful stimulation of the ulcers, and babies drool a lot, however, zinc deficiency is not the main reason for babies drooling. 3. Children with cerebral palsy will partly be accompanied by the symptom of drooling, accompanied by backward motor and intellectual development. You can take your child to the hospital to check the cause of drooling and treat it if necessary.