May also be called: Pinkeye Conjunctivitis is an inflammation (redness and irritation) of the conjunctiva, the tissue covering the white part of the eye and the inner surface of the eyelid. Conjunctivitis is also called pinkeye because it usually makes the white part of eyes red. More to Know Many of the viruses that cause colds and other infections can cause conjunctivitis. Bacteria can cause some cases of pinkeye. Allergies or things in the environment that can irritate eyes also can cause pinkeye. Pinkeye is contagious when caused by viruses and bacteria. It's not contagious when caused by allergies or environmental irritants. Doctors usually recommend keeping kids diagnosed with contagious conjunctivitis out of school, childcare, or summer camp for a short time. Keep in Mind Pinkeye is a fairly common condition and usually causes no long-term eye or vision damage. Still, if your child shows symptoms of pinkeye, it's important to see a doctor. To prevent pinkeye caused by germs (bacteria and viruses), teach kids to wash their hands& well and often with warm water and soap. They also should not share eye drops, tissues, eye makeup, washcloths, towels, or pillowcases with other people. All A to Z dictionary entries are regularly reviewed by KidsHealth medical experts. Back to Articles Related Articles Seasonal Allergies (Hay Fever) At various times of the year, pollen and mold spores trigger the cold-like symptoms associated with seasonal allergies. Most kids find relief through reduced exposure to allergens or with medicines. Read More First Aid: Pinkeye Pinkeye is an inflammation of the white part of the eye and the inner eyelids. Although some kinds of pinkeye go away on their own, others require treatment. Read More Pinkeye (Conjunctivitis) Pinkeye, or conjunctivitis, is the most common eye infection affecting kids. Learn more about pinkeye and how to prevent it from spreading. Read More Pinkeye Pinkeye is the most common eye problem kids can have. It causes redness, itching, inflammation, and pus to collect in the eyes. Read More Pinkeye (Conjunctivitis) Conjunctivitis, commonly called pinkeye, is an inflammation of the tissue covering the eye and inner surface of the eyelid. Read More Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.