Drooling in babies may be a normal physiological phenomenon or it may be a sign of pediatric cerebral palsy. Infants and toddlers are relatively small and the swallowing function is not quite perfect at this time, so drooling is normal. In addition, children who are teething are also prone to drooling. There is also a special phenomenon to be aware of, babies may have mouth ulcers or herpes pharyngitis, in this case, babies are also prone to drooling. If your baby is drooling a lot, you should keep him/her dry, otherwise he/she will get eczema easily. If your baby has none of these conditions, it is possible that he or she has pediatric cerebral palsy, and special attention should be paid to whether the child has abnormal muscle tone and abnormal motor development. If the baby is unable to lift his head or sit up independently at an age, it is likely to be pediatric cerebral palsy and further MRI of the brain is needed.