By raising 4 children and sending them to public school, I got to see pink eye more than once. It is very, very contagious. Keep washing your hands, daughter's hands, and ask her to keep her hands away from eyes. Pink eye usually gets started by using the hand to wipe at nose, then later smearing those nasty "snot-germs" into eye. If you take her to a doctor, they will prescribe antibiotic drops that work well. If you'd like to avoid doctor visits in the future, keep a bottle of SIMILASAN in your first aid kit. At the first sign of infection, morning or night, put drops in eye. I found it to be extremely effective in stopping the infection at first sign. You can google SIMILASAN. It is sold over-the-counter at most stores.