Pink Eye Symptoms and Treatment: What You Need to Know

What is conjunctivitis and why does it look so dramatic?

The conjunctiva is the transparent membrane that covers the white part of the eye (sclera) and lines the inside of the eyelids. When it becomes inflamed — from infection, allergy, or irritation — blood vessels dilate and become visible, producing the characteristic redness that gives "pink eye" its name.

Conjunctivitis is extremely common. It can affect one or both eyes and typically causes redness, discharge, and sometimes discomfort or light sensitivity [1, 2]. The appearance can be alarming, but the condition is usually benign and self-limiting.

What are the different types of pink eye?

Viral conjunctivitis is the most common type. It is often caused by adenoviruses, the same family responsible for many respiratory infections. It frequently accompanies a cold, sore throat, or upper respiratory infection.

• Both eyes are often involved (though it may start in one and spread)
• Discharge is typically watery, not thick
• Eyelids may be swollen and feel gritty
• It is highly contagious through direct contact and contaminated surfaces
• Antibiotic drops do not help viral infections 1Ref 1Cheung AY, Choi DS, Ahmad S, Amescua G, Jhanji V, Lin A, Mian SI, Rhee MK, Viriya ET, Mah FS, Varu DM; American Academy of Ophthalmology Preferred Practice Pattern Cornea/External Disease Panel (2024).Conjunctivitis Preferred Practice Pattern.Classification of conjunctivitis types, viral vs. bacterial management, role and limitations of antibiotic drops, contagiousness, contact lens precautions, and red flags requiring evaluation

Bacterial conjunctivitis tends to produce a thicker, more purulent (pus-like) discharge that may crust the eyelids together in the morning.

• More commonly affects one eye, though it can spread to the second
• Common bacteria include Staphylococcus aureus, Streptococcus pneumoniae, and Haemophilus influenzae (in children)
• In adults without contact lens use, mild bacterial conjunctivitis often resolves on its own within one to two weeks; antibiotic drops may shorten the course 1Ref 1Cheung AY, Choi DS, Ahmad S, Amescua G, Jhanji V, Lin A, Mian SI, Rhee MK, Viriya ET, Mah FS, Varu DM; American Academy of Ophthalmology Preferred Practice Pattern Cornea/External Disease Panel (2024).Conjunctivitis Preferred Practice Pattern.Classification of conjunctivitis types, viral vs. bacterial management, role and limitations of antibiotic drops, contagiousness, contact lens precautions, and red flags requiring evaluation
• In contact lens wearers, bacterial conjunctivitis is taken more seriously because of the risk of corneal infection

Allergic conjunctivitis is not an infection — it is the eye's response to an allergen (pollen, pet dander, dust mites, contact lens deposits).

• Intense itching is the hallmark symptom; itching is less prominent in viral or bacterial types
• Affects both eyes simultaneously
• Not contagious
• Associated with other allergy symptoms (runny nose, sneezing)
• Responds to antihistamine or mast cell stabilizer eye drops 1Ref 1Cheung AY, Choi DS, Ahmad S, Amescua G, Jhanji V, Lin A, Mian SI, Rhee MK, Viriya ET, Mah FS, Varu DM; American Academy of Ophthalmology Preferred Practice Pattern Cornea/External Disease Panel (2024).Conjunctivitis Preferred Practice Pattern.Classification of conjunctivitis types, viral vs. bacterial management, role and limitations of antibiotic drops, contagiousness, contact lens precautions, and red flags requiring evaluation

Chemical or irritant conjunctivitis results from exposure to chlorine, smoke, cosmetics, or other irritants. It typically resolves with removal of the irritant and rinsing.

Is pink eye contagious?

Viral and bacterial conjunctivitis are both contagious. They spread through:

• Touching your eye with contaminated hands
• Sharing towels, pillowcases, or eye makeup
• Contact with discharge from an infected eye

Almost all outbreaks of pink eye in schools, households, and workplaces are viral. Good hand hygiene and avoiding touching the eyes are the most effective preventive measures. A person with viral conjunctivitis typically remains contagious as long as the discharge is present 1Ref 1Cheung AY, Choi DS, Ahmad S, Amescua G, Jhanji V, Lin A, Mian SI, Rhee MK, Viriya ET, Mah FS, Varu DM; American Academy of Ophthalmology Preferred Practice Pattern Cornea/External Disease Panel (2024).Conjunctivitis Preferred Practice Pattern.Classification of conjunctivitis types, viral vs. bacterial management, role and limitations of antibiotic drops, contagiousness, contact lens precautions, and red flags requiring evaluation2Ref 2Centers for Disease Control and Prevention (2024).Clinical Overview of Pink Eye (Conjunctivitis).Confirmation that most acute infectious conjunctivitis in adults is viral and self-limited, not requiring antibiotic treatment; bacterial causes and transmission prevention.

Allergic conjunctivitis is not contagious — it cannot spread from person to person.

Do I need antibiotic eye drops?

This is the question most people with pink eye ask.

For viral conjunctivitis: No. Antibiotic drops do not affect viral infections. Treatment is supportive — cool compresses, preservative-free artificial tears for comfort, and good hygiene. Most viral cases resolve within one to two weeks without any medication 1Ref 1Cheung AY, Choi DS, Ahmad S, Amescua G, Jhanji V, Lin A, Mian SI, Rhee MK, Viriya ET, Mah FS, Varu DM; American Academy of Ophthalmology Preferred Practice Pattern Cornea/External Disease Panel (2024).Conjunctivitis Preferred Practice Pattern.Classification of conjunctivitis types, viral vs. bacterial management, role and limitations of antibiotic drops, contagiousness, contact lens precautions, and red flags requiring evaluation2Ref 2Centers for Disease Control and Prevention (2024).Clinical Overview of Pink Eye (Conjunctivitis).Confirmation that most acute infectious conjunctivitis in adults is viral and self-limited, not requiring antibiotic treatment; bacterial causes and transmission prevention.

For bacterial conjunctivitis in otherwise healthy adults: Mild cases often resolve without antibiotics, though antibiotic drops can shorten the duration and reduce the time the person remains contagious. The decision to treat with antibiotics depends on the severity, whether one or both eyes are involved, and whether the person wears contact lenses 1Ref 1Cheung AY, Choi DS, Ahmad S, Amescua G, Jhanji V, Lin A, Mian SI, Rhee MK, Viriya ET, Mah FS, Varu DM; American Academy of Ophthalmology Preferred Practice Pattern Cornea/External Disease Panel (2024).Conjunctivitis Preferred Practice Pattern.Classification of conjunctivitis types, viral vs. bacterial management, role and limitations of antibiotic drops, contagiousness, contact lens precautions, and red flags requiring evaluation.

For contact lens wearers: Pink eye in a contact lens wearer should be evaluated promptly by an eye care provider. Contact lens use raises the risk of corneal involvement (keratitis), which is more serious than simple conjunctivitis. Lenses should be removed until cleared by a clinician.

For newborns: Conjunctivitis in a newborn is a medical urgency regardless of cause and should be evaluated the same day. Neonatal conjunctivitis has serious causes including gonorrhea and chlamydia that require specific treatment.

How to care for pink eye at home (for mild viral or allergic cases)

• Cool or warm compresses applied to closed eyelids can relieve discomfort — whatever feels better to you
• Preservative-free artificial tears help flush the eye and reduce grittiness
• Remove contact lenses and switch to glasses until the infection clears
• Avoid touching or rubbing the eye
• Wash hands frequently, particularly before and after touching the face or eye area
• Do not share towels, pillowcases, or eye makeup with others
• Discard eye makeup that may have been used while the eye was infected — reusing it can reinfect you
• Antihistamine eye drops are appropriate for allergic conjunctivitis; over-the-counter options are available

When should I see a doctor or eye care provider?

Most viral pink eye does not require a doctor visit. Seek evaluation if:

• Symptoms have not improved after two weeks
• You wear contact lenses (evaluate sooner — within a day or two of onset)
• Vision is blurry (not just from discharge that clears when you blink)
• The eye is very painful rather than mildly uncomfortable
• Light sensitivity is severe
• There is significant swelling of the eyelid, particularly if associated with fever
• You are an infant or very young child
• Discharge is very thick and heavy from the outset [1, 2]

A Gale primary care clinician can evaluate your symptoms, assess whether bacterial infection is likely and whether antibiotic drops are appropriate, and refer you to an eye specialist if the presentation is atypical or concerning.