We have been encouraged to get this looked into, to make sure everything is okay.
Doing a search, I came across an article from Dr. Sears. ~ you can go to the link to see the whole thing, I'm just including excerpts.
"Infants and children sometimes exhibit certain normal and harmless behaviors that are nonetheless nuisances -- I refer to these as "quirks." Excessive drooling is a very common quirk, and in fact, excessive saliva production can be healthy. Saliva bathes the teeth and gums, washing away accumulated food and bacteria. The enzymes in saliva also help break down the carbohydrates in food, operating as a head start in the digestive process. In addition, saliva is a natural intestinal lubricant: Infants commonly suffer from gastroesophageal reflux (regurgitation of the acidic stomach contents into the esophagus); saliva lubricates the lining of the esophagus and helps neutralize the acidity. It also contains a healthy substance called epidural growth factor, which helps the intestinal lining mature.
Since your grandson is still in the teething stage, you should expect excess drooling over the next six months, or until all his teeth are in. Here are some home remedies you can use to prevent the sometimes irritating effects of excess saliva."
Apparently, his drooling is perfectly fine. In fact, he's probably healthier for it.
