The babbling of a four-month-old baby may be a normal physiological phenomenon, or it may be that the baby has a cold, intestinal flatulence and other diseases. 1. Normal physiological phenomenon: four-month-old babies may be the beginning of speech, babies usually start talking babbling sound, babies talk time is different from person to person, not exactly the same, this time the parents should be more and more communication with the child, is conducive to the development of the baby’s language. 2. Disease: four months baby babbling may also be the baby recently have uncomfortable symptoms, such as colds and nasal congestion or intestinal flatulence and other conditions, usually more observation of the baby there are no other symptoms. The four-month-old babbling may also have other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, give targeted treatment or treatment.