If your two-month-old baby is drooling and spitting bubbles, pay attention to the presence of respiratory infections, especially pay attention to the presence of pneumonia, because respiratory infections are common for two-month-old babies and because of their weak phlegm and coughing functions, they do not always cough and must be seen in a pediatric respiratory clinic or pediatric outpatient clinic at the hospital. Also note if there is herpes in the mouth and throat that can cause your baby to drool and spit bubbles. Also pay attention to whether your child has gastroesophageal reflux, because two-month-old babies with small stomach capacity, well-developed pylorus and relatively incomplete cardia are prone to physiological gastroesophageal reflux, and if they are locally cold or have an improper diet, they are also prone to poor digestive function, leading to drooling, spitting bubbles and reduced appetite.