Pneumonia in a child of 10 days or so may be caused by intrauterine or labor hypoxia, pathogen infection, improper care and other factors. 1. Intrauterine or delivery hypoxia: The lack of oxygen in the uterus or during delivery may cause stimulation of the respiratory center, inhalation of amniotic fluid or meconium, which may easily cause aspiration pneumonia. 2. Pathogen infection: if the mother has pathogen disease or premature rupture of membranes, the pathogens may pass through the placenta to the fetus through the bloodstream, which will cause the fetus to have pneumonia after birth. 3. Inadequate care: Because of the low immunity of newborns, improper parental care or exposure to poorly sterilized environments can easily cause newborns to develop infectious pneumonia. Pneumonia in 10 days may also be related to other causes, it is recommended that after the symptoms of pneumonia in newborns, timely medical examination and treatment to avoid other complications.