What diagnosis is likely for a girl that has her right eye swollen blood shot and the lining of the lower lid is bright red with a thick yellow discharge in the corner of the eye?

Conjunctivitis or "pink-eye" is the most likely culprit. She should be seen by her pediatrician and should avoid contact with other children as it can be contagious. If you treat this child or help clean up the discharge, be certain to wash your hands thoroughly before touching your own face or eyes. Wear latex or nitrile exam gloves (available at most pharmacies or department stores) and discard them after use.