Pinkeye, or conjunctivitis, is inflammation of the membranes (conjunctiva) covering the white parts of the eyes and the membranes on the inner part of the eyelids.Source: iStock
Things to know about Pinkeye (conjunctivitis)
- Pinkeye (conjunctivitis) can be due to infectious or noninfectious causes.
- Infectious pinkeye is highly contagious.
- Bacterial or viral infections are common causes of infectious pinkeye.
- Avoiding contact with infected people, disinfection of household surfaces, and good hygienic practices can help prevent the spread of infectious pinkeye.
- Noninfectious pinkeye can be caused by
- chemical irritation,
- underlying inflammatory diseases, or
Pink Eye (Conjunctivitis) Symptoms and Signs
Pinkeye is characterized by reddening of the conjunctiva of the eyes, discharge from the eyes, and can be accompanied by other signs of infection like sinus congestion and runny nose.
Common pinkeye symptoms and Signs
- Eye Discharge
- Eye Pain
- Eye Redness
- Itching Eyes
- Pus Drainage From Eye
- Runny Nose
- Sinus Congestion
- Swollen Eyelids
- Swollen Lymph Nodes
Viral and bacterial forms of conjunctivitis are common in childhood, but they occur in adults as well. Pinkeye can occur in people of any age.Source: iStock
What is pinkeye (conjunctivitis)?
Pinkeye, or conjunctivitis, is inflammation of the membranes (conjunctiva) covering the white parts of the eyes and the membranes on the inner part of the eyelids. These membranes react to a wide range of bacteria, viruses, allergy-provoking agents, irritants, and toxic agents, as well as to underlying diseases within the body.
- Viral and bacterial forms of conjunctivitis are common in childhood, but they occur in adults as well. Pinkeye can occur in people of any age.
- Overall, however, there are many causes of pinkeye. These can be classified as either infectious or noninfectious.
- Pinkeye does not cause any changes in vision.
Viral pinkeye is highly contagious and typically remains contagious for 10 to 12 days after the onset of symptoms.Source: Bigstock, Medscape
Viral Pinkeye Causes, Symptoms, and Treatment
The leading cause of a red, inflamed eye is a viral infection. Adenoviruses are the type of virus that is most commonly responsible for the infection. Other viruses that can cause pinkeye include
Viral pinkeye symptoms are usually associated with more of a watery discharge from the eye that is not green or yellow in color. The discharge may resemble an increase in tears or watery eyes. Viral pinkeye is most common in late fall and early spring. Often, viral "cold-like" symptoms, such as
While viral pinkeye may not require an antibiotic, those affected should see a doctor, as occasionally this form of pinkeye can be associated with infection of the cornea (the clear portion of the front of the eyeball).
This infection must be correctly detected and treated.
- Viral pinkeye is highly contagious and typically remains contagious for 10 to 12 days after the onset of symptoms.
- The symptoms of viral pinkeye can last one to two weeks.
- Symptoms are pronounced for the first three to five days after symptoms appear, with slow resolution over the following one to two weeks.
A sick child with a fever in bed and an example of bacterial pinkeye (conjunctivitis) with discharge.Source: iStock, Tanalai at en.wikipedia
Bacterial Pinkeye: Causes, Symptoms, and Treatment
Staphylococci and Streptococci are types of bacteria that commonly cause pinkeye. Gonococci and chlamydia may also cause bacterial pinkeye. Symptoms of pinkeye caused by bacteria occur rapidly and can include
- eye pain or burning,
- a moderate to a large amount of oozing or eye discharge, usually thick and yellow or greenish in color,
- swelling of the lymph nodes in front of the ears.
The discharge commonly accumulates after sleeping. Affected children may awaken with crusty eyelashes most unhappy that their "eyes are stuck shut," requiring a warm washcloth applied to the eyes to remove the discharge. Bacterial conjunctivitis is treated by repeated warm washcloths applied to the eyes (try applying these to a child's eye one eye at a time during a favorite video) and requires antibiotic eye drops or ointment prescribed by the doctor.
Be careful not to use medication prescribed for someone else, or from an old infection, as these may be inappropriate for the current infection or may have been contaminated from other infections by accidentally touching the medicine bottle to infected areas. A safe, effective, and potentially less frightening method of putting drops into the eyes of children involves asking the child to lie down flat, with instructions to merely "close your eyes," and placing the recommended number of drops in the inner corner of the eye, next to the bridge of the nose, and letting them make a little "lake" there. When the child relaxes and opens the eyes, the medicine will flow gently into the infected mucous membranes without the need to "force open" the eyes.
When someone thinks he (or she) has bacterial conjunctivitis (bacterial pinkeye), it is very important to see a doctor immediately for several reasons.
- First, if the cause is a bacterial infection, an antibiotic will be needed to help the infection-fighting immune system to kill this infection.
- Types of topical ophthalmic (eye drops) antibiotics often used for pinkeye include besifloxacin (Besivance), gatifloxacin (Zymaxid), levofloxacin (Levaquin, Quixin, Iquix), moxifloxacin (Moxeza, Vigamox), tobramycin (Tobrex), ciprofloxacin (Ciloxan), erythromycin (Ilotycin), and others.
- Secondly, if someone is experiencing other symptoms such as a runny nose, cough, earache, etc., there is a good chance that these symptoms are caused by the same bacteria, and an oral antibiotic may also be needed to treat this infection along with the antibiotic eye drops or ointment for the eyes.
- Oral antibiotics are also required for some types of bacterial pinkeye.
- Finally, a doctor will want to exclude the possibility that the infection has spread to areas where the symptoms may not yet be recognizable.
Example of pinkeye due to chlamydia and conjunctivitis facts from the CDC.Source: Jonathan Trobe, M.D. - University of Michigan Kellogg Eye Center, CDC
Chlamydia Pinkeye: Causes, Symptoms, and Treatment
Pinkeye due to infection with chlamydia is an uncommon form of bacterial pinkeye in the U.S., but it is very common in Africa and Middle Eastern countries.
- Chlamydia pinkeye symptoms are similar to bacterial pinkeye symptoms.
- Chlamydia can cause pinkeye in adults and babies. It is a cause of pinkeye in adolescents and adults that can be sexually transmitted.
- Chlamydia pinkeye is typically treated with erythromycin (E-Mycin, Eryc, Ery-Tab, PCE, Pediazole, Ilosone) or oral tetracycline (Sumycin), except in children less than 8 years of age, because of possible discoloration of the teeth.
A woman suffers from seasonal allergies and an example of allergic pinkeye (conjunctivitis).Source: iStock
Allergic Pinkeye: Causes, Symptoms, and Treatment
Allergic conjunctivitis symptoms and signs are usually accompanied by intense itching, tearing, and swelling of the eye membranes. Eye pain is minimal or absent with allergic conjunctivitis.
Frequent causes include seasonal pollens, animal dander, and dust. It is frequently seasonal and accompanied by other typical allergy symptoms such as
Moist, cold compresses applied to the eyes, and over-the-counter (OTC) decongestant eye drops can provide relief. Avoiding exposure to the allergen particle that leads to an allergic reaction is most helpful. A doctor can prescribe stronger medications if these home remedies are not adequate.
The colored part of the eye that helps regulate the amount of light that enters is called the:
A girl with pinkeye caused by smoke.Source: iStock
Chemical Pinkeye: Causes, Symptoms, and Treatment
Chemical pinkeye can result when any irritating substance enters the eyes. Common offending irritants are
Prompt, thorough washing of the eyes with very large amounts of water is very important if an irritating substance enters the eye. A doctor or local poison control center should be contacted at once, even if the irritant or chemical is thought to be safe, as some of the most common household products like bleach and furniture polish can be very damaging.
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A doctor performs an eye exam on an elderly woman.Source: iStock
Bright redness of the whites of the eyes can also occur when the tiny blood vessels covering the whites of the eyes rupture from trauma or changes in pressure within the head (for example, after forceful laughing or vomiting, when diving underwater, or even bending upside down). While it is similar, this condition is called a subconjunctival hemorrhage, and while it can appear frightening, it is generally harmless.
- This condition is different from the inflammation of the conjunctiva seen with pinkeye.
- It causes a local area of the white portion of the eye (the sclera) to become brilliantly reddened. It does not typically involve the colored portion of the eye (the iris) and does not affect vision.
Pink Eye (Conjunctivitis) Symptoms, Causes, Treatments
A woman puts eye drops in a man's eye to treat his pinkeye.Source: iStock
What are home remedies for pinkeye?
Home treatment for pinkeye should not be a substitute for seeking the advice of a health care professional, and it is important to take all medications as prescribed and to follow a health care professional's instructions for managing the condition. However, there are home remedies to help relieve the symptoms of pinkeye.
- Moist warm compresses applied to the eyes can help relieve symptoms.
- OTC treatments like artificial tears (eye drops) can also bring relief.
- Do not wear contact lenses until the pinkeye has resolved. A health care professional can offer guidance about when it is safe to resume the use of contact lenses.
- Eye makeup and
- cosmetic creams should also be avoided in the eye area until the symptoms and signs have resolved.
What kinds of doctors treat pinkeye?
Pinkeye is often treated by primary care physicians, including pediatricians and family practitioners. An eye doctor (ophthalmologist) may also treat pinkeye. Sometimes people may seek care for pinkeye at an urgent care center and may be treated by a specialist in emergency medicine.
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A mother and daughter wash their hands.Source: iStock
What is the prognosis for pinkeye?
Most uncomplicated cases of pinkeye heal completely without long-term complications. Pinkeye that is related to underlying diseases may recur over time. Some serious infections of the eye may lead to vision loss when not treated properly, so it is important to seek care for severe or persistent pinkeye, or pinkeye that is associated with decreased vision.
How can someone prevent the spread of pinkeye?
Infectious forms of pinkeye are highly contagious and are spread by direct contact with infected people. If someone has infectious pinkeye,
- avoid touching the eye area and wash your hands frequently,
- particularly after applying medications to the eye area.
- Never share towels or handkerchiefs, and throw away tissues after each use.
- Disinfecting surfaces like countertops, sinks, and doorknobs can also help prevent the spread of infectious pinkeye.
Medically Reviewed on 4/14/2022
Boyd, Kierstan. "Conjunctivitis: What Is Pink Eye?" American Academy of Ophthalmology. Mar. 1, 2017.
Yeung, Karen K. "Bacterial Conjunctivitis (Pink Eye)." Medscape.com. Oct. 5, 2017. <http://emedicine.medscape.com/article/1191730-overview>.