Frequent dry heaving in three-year-old babies may be caused by environmental factors, oral diseases, reflux esophagitis, chronic pharyngitis, nasal diseases, etc. It is recommended to consult a doctor in time. 1. Environmental factors: such as poor air quality in the living environment, talking too much, using irritating toothpaste, eating too much irritating food, etc., can induce frequent dry heaving. 2. Oral diseases: such as gingivitis, periodontitis, etc., if not treated in time, may cause recurrent bleeding gums, stimulate the throat and thus frequent dry heaving. 3. Reflux esophagitis: the reflux of gastric acid stimulates the throat, thus triggering dry heaving, and children can also be accompanied by a burning sensation behind the sternum, dysphagia and other uncomfortable symptoms. 4. Chronic pharyngolaryngitis: the back wall of the pharynx is often stimulated by thick secretions, and children can also have dry, painful, irritating cough and other discomforts of the pharynx, and often have throat clearing and dry retching. 5. Nasal diseases: such as rhinitis, sinusitis, etc., purulent secretions backflow to the throat to produce stimulation, triggering frequent dry heaving. Three-year-old baby often dry heaving, it is recommended that timely medical attention, under the guidance of the doctor to identify the cause, if necessary, follow the doctor’s instructions for appropriate treatment.