Deep breathing in children may be caused by physiological factors or by disease factors, such as pneumonia. 1. After strenuous activities, children will increase the body’s oxygen consumption, which will be compensated by increasing the respiratory rate and the depth of respiration, resulting in the manifestation of deep breathing. 2. If a child suffers from respiratory diseases such as pneumonia, deep breathing will occur because of gas exchange disorders, accompanied by shortness of breath, coughing and other manifestations; or because of diabetes and other diseases caused by acidosis, there will also be deep breathing symptoms, which will often be accompanied by the expiratory gas smell of rotten apples. If the children appear deep breathing and accompanied by uncomfortable symptoms, you need to take the child to the hospital pediatrics in a timely manner, so as not to delay the condition.