Baby more than two months mouth drooling and spitting, may be physiological factors, it is normal; also consider respiratory infections, intelligent abnormalities, epilepsy and other causes of drooling and spitting, which is not normal. 1. Physiological factors: baby salivary glands developed, shallow lips, swallowing function is not well developed, easy to often drooling and spitting, as long as there are no other uncomfortable symptoms, timely wiping, consider normal. 2. Respiratory infections: the baby swallowing function is not well developed, there are respiratory infections, phlegm can not be coughed out, there may be the symptom of foaming, most of them are accompanied by fever, cough and so on, which is not normal. 3. Intelligence abnormality: For example, children with cerebral palsy may have drooling, abnormal muscle tone, etc. Take your child to the hospital in time to confirm the diagnosis and treatment as soon as possible. 4. Epilepsy: Foaming at the mouth may also occur during epileptic seizures, accompanied by convulsions and clonus of the limbs, etc. The child may have repeated drooling and foaming at the mouth. The child repeatedly appeared mouth drooling foaming, take the child to the hospital in time to exclude the disease.