My almost 2 year still drools alot. why?

No social conscience: A two year old is the king/queen of their universe & unrestrained by such things as a social conscience. They are seldom worried about what they wear or whether their hands, face etc are dirty or covered with drool. Can they be teething ? Yes. Can they have sores in their mouth?Yes.Can they go about their day unconcerned about the drool? Certainly!

Drooling may be : Atypical after 18 mos. If feeding problems ; speech (articulation) errors that are not typical for age co-exist. Low oral-motor tone with persistent open-mouth posture, lack of rotary chewing with closed mouth ; lack of lip-closure in drinking from an open-mouthed cup warrant a diagnostic neurodevelopmental assessment ; referral to early intervention for evaluation ; ot + speech/language therapy.