Two-year-old babies drooling a lot may be the swallowing ability is not perfect, budding teeth stimulate gums and oral ulcers and other reasons. 1. swallowing ability is not perfect: two-year-old baby’s oral development is not perfect, swallowing ability is not fully established, saliva secretion is more, not swallowed in time will appear drooling symptoms. 2. Emerging teeth stimulate the gums: two-year-old babies begin to sprout new teeth, in the process of sprouting teeth stimulate the gums, resulting in itchy gums, so that the mouth saliva increase, may be manifested as a symptom of drooling a lot. 3. Mouth ulcers: when the baby mouth ulcers, after eating the stimulation aggravated, there will be an increase in saliva, showing the symptoms of drooling a lot. When the two-year-old baby drooling a lot of symptoms, it is recommended to go to the hospital in time for examination and diagnosis, and under the guidance of the doctor to carry out the corresponding treatment.