Babies spitting out their tongues and spitting out bubbles may be physiological phenomenon, or it may be the manifestation of pneumonia and stomatitis. 1. Physiological phenomenon: infants after three or four months, the salivary glands develop rapidly, prone to increased secretion of the salivary glands, but the swallowing function is not yet perfect, so there will be infants spit out their tongues and spit out the bubbles of the situation. 2. Pneumonia:Small infants, especially newborns within one month, spitting bubbles is often a manifestation of phlegm in the lungs, due to the imperfect development of its respiratory muscles, it is more difficult to coughing action, but phlegm is presented through the way of spitting bubbles. 3. stomatitis: when an infant has an oral infection, due to pain, salivary gland secretion will also increase, this time manifested as spitting tongue spitting bubbles. Babies spit out their tongues and spit bubbles, there are other reasons, it is recommended to consult a doctor as soon as possible to find out the cause, and follow the doctor’s instructions for scientific treatment.