Dry heaving in 9 month old babies may be caused by improper feeding, indigestion, pharyngitis and other reasons. 1. Improper feeding: it may be caused by parents overfeeding their babies, or the food is too dry, drinking too little water, etc. The food irritates the throat, which may lead to the symptoms of dry heaving in 9-month-old babies. 2. Indigestion: it may cause food to accumulate in the gastrointestinal tract, leading to symptoms such as decreased appetite, bloating, nausea, etc. If the nausea is more severe, it will cause the 9-month-old baby to experience dry heaving. 3. pharyngitis: mostly due to the baby’s low resistance, pathogens invade the throat caused by inflammation stimulation, will lead to dry and itchy throat, which causes 9 months baby dry heaving symptoms. 9 months baby dry heaving may also be other causes, it is recommended to go to the hospital in time, improve the examination to clarify the cause, give targeted treatment or standardized treatment.