The infection occurs when bacteria, a virus, or an allergic reaction inflames the transparent membrane covering the whites of the eyes and the inside of the eyelids. As your child's immune system tries to fight the infection, her eyes will tear or run and become crusty. Take your toddler to the doctor as soon as possible. Your healthcare provider may be able to tell what's causing the infection by looking at her eyes and asking you about her other symptoms. If your child's eyes are producing a thick yellow discharge that causes her eyelids to swell or stick together, bacteria such as staphylococcus, streptococcus, or hemophilus are probably to blame.
Bacterial conjunctivitis is the most common eye infection.
If her eyes are producing a watery discharge and she has a red, swollen throat and swollen lymph glands in front of her ears, it's probably due to a virus. An allergic reaction does not stem from an infection, but it could become one if your child continues to be exposed to the allergen or irritant. If bacterial conjunctivitis is the culprit, your doctor will prescribe antibiotic ointment or drops for you to use on your toddler's eyes for about seven days. If you're using drops, aim them at the inside corner of your child's eye. Wash your hands again after touching your child's eyes.