Why does my three month old drool so much. is he teething already.

Possibly: There is a range for infant tooth eruption and your 3 month old falls within. Feel along the lower front jaw ridge to see if you can feel the first teeth.

Possibly: Most children start teething between 3-6 months of age, but there is a lot of normal variation. Some babies are actually born with bottom front teeth, others don't get them until 9 months old. Teething is often accompanied by excessive drooling. This is all normal and there is nothing we can do to speed up or slow down the process.