Two-year-old children occasionally dry cough, usually with the respiratory tract is stimulated and other physiological factors, as well as upper respiratory tract infection, pharyngitis and other pathological factors. 1. Physiological factors: two-year-old children occasionally dry cough two may be due to the respiratory tract by strong odors, cold air and other stimuli, this is a normal physiological response. 2. Pathological factors: the early stages of upper respiratory tract infections may also make the two-year-old child occasional dry cough, usually accompanied by sneezing, runny nose and other symptoms; part of the pharyngitis patients will also appear occasional dry cough. Two-year-old children occasionally dry cough, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to determine the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.