16 months baby dry heaving may be physiological factors may also be indigestion, acute pharyngitis and other pathological causes. 1. physiological factors: pediatric digestive system is not well developed, the stomach capacity is small, the digestive function is also poor, eat too fast or eat too much food can not be digested in time, resulting in greater pressure on the stomach will appear dry heaving symptoms. 2. Indigestion: Improper feeding leads to indigestion, and too much food accumulates in the stomach to stimulate the diaphragm to cause spasms, which can also cause dry heaving. 3. Acute pharyngitis: Inflammation of the pharynx leads to increased secretion of the mucous membrane at the back wall of the pharynx, and prolonged stimulation of the pharyngeal mucous membrane can also produce dry heaving symptoms. In addition, there are other causes of dry heaving in 16-month-old babies, it is recommended to take the child to the hospital in a timely manner to check the diagnosis, to do targeted treatment.