afraid
anxiety
anxious
background
bad
bite
biting
book
bothered
boy
caucasian
child
children
color
discomfort
disorder
education
emotional
exam
fear
fingernail
habit
kid
knowledge
learn
learning
lilac
little
nail
nails
nervous
panic
people
person
portrait
problem
psychological
pupil
reading
school
stress
stressed
study
tension
thinking
trouble
upset
worried
worry
worrying