It is normal for a four-year-old to cough three or four times a day. May be because the air is too hot, too cold, irritating odors and other reasons, leading to occasional throat discomfort in children, a few times a day cough, is a child’s normal response to external stimuli, is a normal phenomenon. Cough is a normal physiological response, in the clinic, through the number of coughs, frequency, volume, etc., to assess the physical state of the person, such as ordinary upper respiratory tract infection, can show a continuous series of coughing, coughing, coughing volume is generally not large, if the volume increases, showing a severe cough, it suggests that the condition is more serious. In addition, when a person is excessively weak, the volume of the cough will also be reduced. Parents should not be overly concerned about occasional coughing in children, but if it is combined with other abnormalities, such as loss of appetite, fever, indigestion, etc., parents are advised to go to the clinic or hospital in time to avoid delays in the condition.