One-month-old baby spitting bubbles may be a normal physiological phenomenon, or it may be caused by pathological factors, such as respiratory tract infection, brain dysplasia, etc. It is recommended to go to the hospital for a detailed examination to clarify the cause so that the appropriate treatment can be carried out. A, physiological factors: after the birth of the baby, the functions are developing, including the development of salivary glands can cause increased saliva, while a month baby shallow mouth, swallowing function is not well developed, saliva can not be completely swallowed, part may flow out, thus forming the case of spitting bubbles. Belong to the normal physiological phenomenon, no special treatment, with the baby’s growth and development gradually perfect, the symptoms can improve on their own. Second, pathological factors: 1, respiratory tract infections: such as pneumonia, usually due to streptococcus pneumoniae, influenza virus and other pathogens infection, can appear coughing, coughing phlegm, a month baby may spit bubbles by way of phlegm discharge, to relieve discomfort, but also appear breathing faster and other symptoms. Under the guidance of the doctor, we can pat the baby’s back to help cough up the phlegm and apply cefradine and other drugs for anti-infection treatment; 2, brain dysplasia: due to premature birth, lack of oxygen and other factors that affect the control of the salivary gland secretion function of one-month-old babies, resulting in more saliva secretion from the salivary glands, which can appear the phenomenon of spitting bubbles. Can be under the guidance of the doctor to use drugs that nourish the nerves of the brain, such as gangliosides, etc., to improve the symptoms.