What is pinkeye?
Pinkeye is redness and swelling
of the lining of the eyelid and eye surface. The lining is called the
conjunctiva (say "kawn-junk-TY-vuh"), and pinkeye is also called conjunctivitis
(say "kun-JUNK-tih-VY-tus"). The lining of the eye is normally clear and
Pinkeye is common. It usually spreads easily, especially among children
in day care centers and schools.
Because pinkeye is often spread
from eye to hand to eye, good hand-washing is important. Sharing a washcloth,
towel, or other item with a person who has pinkeye can spread the
See pictures of a normal
eye and one with
What causes pinkeye?
Pinkeye is most often caused by a virus. It
usually occurs at the same time as or right after you have had a cold. Less
commonly, pinkeye can be caused by infection with bacteria.
air, allergies, smoke, and chemicals can also cause pinkeye.
What are the symptoms?
Symptoms of pinkeye
You may have symptoms in one eye, both eyes, or the
symptoms may spread from one eye to the other eye. When pinkeye is caused by a
virus, symptoms usually start in one eye and may then spread to the other
If you think you have pinkeye, call your doctor to find out
the best way to treat it. Certain
health risks may increase the seriousness of your
If you have other symptoms like
eye pain or a change in your vision, if you wear contact lenses, or if you
have other medical problems, you may have a more serious eye problem. In these
cases it is especially important to see a doctor. Young children with pinkeye may also have an ear infection, so they may need to see a doctor.
How is pinkeye diagnosed?
can usually diagnose pinkeye with an eye exam and by asking questions about
your symptoms. Sometimes the doctor will use a cotton swab to take some fluid
from around your eye so it can be tested for bacteria or other
How is it treated?
If your doctor thinks the pinkeye is caused by bacteria, he or she may
prescribe antibiotic eyedrops or eye ointment to kill the bacteria. See a
how to apply eye drops or
eye ointment. With antibiotic treatment, symptoms usually go away in 2 to 3
days. But antibiotics only work for bacterial pinkeye, not for the more common
viral pinkeye. Viral pinkeye often clears on its own
in 7 to 10 days. If your
symptoms last longer, call your doctor.
If the pinkeye is caused by an allergy or chemical, it will
not go away until you avoid whatever is causing it.
of pinkeye symptoms can help you feel more comfortable while the infection goes
How can you avoid spreading pinkeye?
Pinkeye caused by a virus or bacteria is spread
through contact with the eye drainage. Touching an infected eye leaves drainage
on your hand. If you touch your other eye or an object when you have drainage
on your hand, you can spread the virus or bacteria.
tips to help prevent the spread of pinkeye:
Some schools ask that children with pinkeye be kept
at home until they are better or have started antibiotic treatment.
Health Tools help you make wise health decisions or take action to improve your health.
The American Academy of Ophthalmology (AAO) is an association of
medical eye doctors. It provides general information and brochures on eye
conditions and diseases and low-vision resources and services. The AAO is not
able to answer questions about specific medical problems or conditions.
The American Optometric Association (AOA), which is a
national organization of optometrists, can provide information on eye health
and eye problems.
As part of the U.S. National Institutes of Health, the National Eye
Institute provides information on eye diseases and vision research.
Publications are available to the public at no charge. The Web site includes
links to various information resources.
Other Works ConsultedEpling J (2007). Bacterial conjunctivitis, search date January 2007. Online version of BMJ Clinical Evidence. Available online: http://www.clinicalevidence.com.Garcia-Ferrer FJ, et al. (2008). Conjunctiva. In P Riordan-Eva, JP Whitcher, eds., Vaughan and Asbury's General Ophthalmology, 17th ed., pp. 98–124. New York: McGraw-Hill.
November 2, 2011
William H. Blahd, Jr., MD, FACEP - Emergency Medicine & H. Michael O'Connor, MD - Emergency Medicine
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