Two months baby drooling may be a normal physiological phenomenon, oral capacity is small will drool, but also may be caused by diseases, such as mouth ulcers. 1. Normal physiological phenomenon: with the growth of the baby, saliva secretion will increase, but the two-month-old baby’s oral cavity capacity is still relatively small, the bottom of the mouth is also relatively shallow, producing more saliva, it is easy to appear the phenomenon of drooling, this situation is normal. 2. Disease caused by: such as the baby has oral ulcers, resulting in localized pain, the baby dare not swallow saliva, the phenomenon of drooling. Two months baby drooling 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’s treatment.