Baby smell odor will dry heaving, may be related to physiological factors, may also be due to laryngitis, gastritis, hepatitis and other causes. 1. physiological factors: the baby smells the odor will dry heaving, most considerations may be caused by normal physiological reflexes, especially the odor is too pungent, unpleasant, more likely to lead to the baby smells the odor and dry heaving. 2. laryngitis: if the baby suffers from laryngitis disease, under the stimulating effect of inflammation, resulting in increased sensitivity of the throat area, in this case, when the smell of the odor, there may be dry heaving symptoms, generally accompanied by coughing, coughing up phlegm, sore throat and other manifestations. 3. gastritis: if the baby suffers from gastritis disease, under the stimulation of inflammation, easily lead to a stress reaction, there may be a smell will be dry vomiting symptoms, may also be accompanied by nausea, vomiting, loss of appetite, abdominal pain and other symptoms. 4. Hepatitis: If the baby suffers from hepatitis disease, resulting in liver function is impaired, resulting in bile secretion is affected, thereby affecting the digestive function, there may be the phenomenon of smelling the odor of dry heaves. Mostly accompanied by abdominal distension, bloating, jaundice, liver enlargement and other manifestations. The baby will smell the odor of dry heaving causes more, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.