Conjunctivitis, or pink eye, is swelling and redness of the clear layer (conjunctiva). This layer covers the white part of the eye and the lining of the eyelids. Conjunctivitis is sometimes called 'sticky eye' or 'pink eye'.
An infection or allergic reaction is the most common cause of conjunctivitis.
Infective conjunctivitis is caused by a virus or bacteria and can spread easily.
It spreads by touching mucus or discharge from the eyes, nose or throat of someone with the infection. It can also spread by touching surfaces and sharing things an infected child has touched.
Allergic conjunctivitis is the body's reaction to something (such as pollen) and will not spread to others. A child will often have other signs of hay fever if the swelling and redness is the result of an allergy. Signs can include an itchy, runny nose and sneezing or a history of other allergic conditions. The eyes are itchy and watery.
Symptoms can appear from 2 to 10 days after getting infected. Once symptoms appear, they can develop quickly over 24 to 72 hours.
It can be difficult to tell whether an allergy, bacteria or a virus is causing the conjunctivitis as redness and swelling of the conjunctiva happen in them all. Many viruses can cause conjunctivitis and the symptoms may appear in a mild form together with any flu-like illness.
Children with conjunctivitis often have:
If the skin around your child's eye becomes swollen, red or sore, the infection may have spread. This can be serious - sometimes it's a sign of cellulitis. If this happens, take your child to your family doctor or after-hours medical centre as soon as possible.
Check the information on cellulitis [1].
Conjunctivitis can last from 2 days to sometimes as long as 3 weeks.
You can help relieve the symptoms of conjunctivitis.
Gently clear away the discharge from the eye with a cotton ball soaked in warm water. Clean in one direction only, moving the cotton ball from the inside to the outside of the eye. Use a separate cotton ball for each eye and throw them away after each use.
You should see your family doctor if you are worried about your child's eyes, or if your child has:
If your baby with conjunctivitis is less than 6 weeks old, you should always see your family doctor or midwife. An infection from bacteria in the birth canal can cause conjunctivitis in newborns. This can cause serious damage to your child's eyes and even their general health if it isn't treated urgently.
Your doctor may prescribe eye drops or ointment as it can be hard to tell whether your child has viral or bacterial conjunctivitis.
Children with conjunctivitis should not go to school or daycare until their eyes are better. That's because the discharge from their eyes can pass the infection on to other children.
If the skin around your child's eye becomes swollen, red or sore, it may be infected. This can be serious - sometimes it's a sign of cellulitis. If this happens, take your child to your family doctor or after-hours medical centre as soon as possible.
Check the information on cellulitis [1].
A stye is a red lump on your child's eyelid. It's caused by a blockage of an oil gland in the eyelid.
Check the information about styes. [2]
The following can cause redness, swelling and pain in a child's eyes:
If your child has an eye injury, take them to a doctor, after hours clinic or emergency department as soon as possible.
If your child has had chemicals splashed in their eye, they need immediate first aid. Wash their eye(s) with water for at least 10 minutes and then take your child to your doctor straightaway.
Some babies have watery discharge from one eye over many weeks. If your baby's eye is watery but not red, they may have a blocked tear duct rather than conjunctivitis.
Stock images from https://www.123rf.com [4]
Illustration of child with conjunctivitis by Dr Greta File. Property of KidsHealth.
This page last reviewed 21 February 2022.
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Links
[1] https://kidshealth.org.nz/cellulitis
[2] https://kidshealth.org.nz/stye
[3] https://kidshealth.org.nz/blocked-tear-duct
[4] https://www.123rf.com
[5] https://kidshealth.org.nz/contact?from=http%3A%2F%2Fkidshealth.org.nz%2Fprint%2F192%3Flanguage%3Drar