One year and eight months old baby still drooling, usually for physiological reasons, in addition there may be indigestion, tonsillitis or stomatitis and other diseases caused by. 1. Physiological reasons: generally in the baby 4 ~ 6 months after the salivary gland secretion gradually increased, the small baby mouth is shallow, secretion of saliva swallowing is not timely, there will be the phenomenon of drooling, and in the baby’s teething period, there will also be uncomfortable gums, drooling, some of the baby’s symptoms will continue to the age of two weeks or so. The baby’s appetite is good, there is no redness, swelling or other discomfort in the mouth, usually considered to be physiological reasons. 2. Poor digestion: baby gastrointestinal digestion is relatively weak, if the diet irregularities increase the burden on the stomach and intestines, easy to accumulate food or gastroesophageal reflux, there will also be a lot of drooling, and accompanied by a thick and greasy tongue, bad breath, bloating, stool abnormalities and other discomforts. 3. tonsillitis or stomatitis: respiratory infections, tonsils swollen and painful, or ulcers in the mouth, will be due to local pain and swallowing difficulties and drooling significantly more, accompanied by a poor mental state, loss of appetite, coughing, and even fever, etc., the emergence of these symptoms need to go to the hospital. One year and eight months old baby drooling, should be combined with the baby’s development and accompanying symptoms to assess whether there are other pathological causes, can not identify the need to go to the hospital, so as not to affect the healthy development of the baby.