As toddlers leave behind the baby stage, habits like thumb-sucking can be a way of soothing stress or anxiety. Sometimes habits happen because children are bored. ... Children who keep picking even after they've learned to blow their noses probably have habits.
OMG!!!! I am that girl who plucks and bites my lip when i was little. I have that bad habit till like 10 years old
I did that when young. Will outgrow one.