when does baby actually start teething

Normally babies start teething around 6 months. however it is also possible for some babies to teeth as early as 3 months or after they are a year old.
By the time they are 3 years old, children have their primary set of 20 teeth.

thank u si much Dr daughter is 7months old nw but m confused whether she is teething or not...she always try to bite her teeth bite toy or my finger...i can c white formation at her lower jaw...its is der since very long

can i also knw d symptoms rather than these