Pneumonia in a two-month-old child often presents with the following symptoms: 1. cough, because pneumonia is an infection of the lower respiratory tract and most children will have a cough and sound with phlegm. 2. fever and faster breathing, because pneumonia in children is caused by various pathogens, such as viruses, bacteria or mycoplasma, which cause an increase in inflammatory factors in the child’s body. 3. The amount of milk eaten by the child decreases significantly, and the amount of milk eaten by the child is greatly affected by pneumonia.