How long does it take to treat a four year old baby with bronchopneumonia, a condition that mainly depends on whether the baby has a mild form of pneumonia and or a severe form of pneumonia. If it is a mild case of bronchopneumonia, the usual course of treatment is about seven days. In mild pneumonia, the main symptoms are fever, cough, shortness of breath, and the child has no obvious mental condition. The blood inflammation index is not very high, and the chest X-ray does not show any obvious large lung shadows, which is relatively curable. If it is severe pneumonia, the time is usually longer. Severe pneumonia is usually a large pneumonia or a pneumonia that involves other systems, such as the circulatory system, nervous system, digestive system. Involvement of the circulatory system can lead to myocarditis or heart failure. The main signs of heart failure in severe pneumonia are a sudden increase in respiration greater than 60 beats/minute, a sudden increase in heart rate greater than 180 beats/minute, or a sudden onset of extreme irritability and marked cyanosis. Another is the auscultation, you can find the heart sound low blunt, gallop rhythm, and urine or no urine, this situation all suggests that the pneumonia is more serious. In the case of severe pneumonia, it takes a little longer, about 2-3 weeks, and the treatment is more complicated, requiring the use of more advanced antibiotics.