Is it possible for a 3 month olds molars to come in first? baby is teething stuck finger in mouth felt hardness and a knot on back gum.

Don't expect it: You can feel that hardness back there for years before the molars actually come in. Infants often gnaw on their fingers because it feels good. Anything that touched their mouth/lips is pleasurable. We are made that way so babies will latch/feed long before they figure out feeding is important. Expect the lower central incisors to be first, although there is some variability.

Teething: Lower 1st & 2nd baby molars usually erupt at ages 2 & 3. Unusual to be able to feel a hard lump on gum ridge at this age. Baby's put everything in their mouth. As tongue is the most tactile organ in the body it helps them explore and learn. Would not be out of place to have a Pedodontist, a Pediatric Dental Specialist, take a look.