Pink eye, or conjunctivitis, is a common and often contagious eye condition. This guide will help you understand how to manage pink eye.
Tag: allergic conjunctivitis
Conjunctivitis: Causes and Types
The conjunctiva is the transparent mucous membrane that lines the outer surface of the eye and the inner surface of…
Conjunctivitis (Pink Eye): Symptoms, Causes, and Treatment
Conjunctivitis is an inflammation of the conjunctiva — the thin, transparent membrane that covers the white of the eye and lines the inner eyelids. It is one of the most common eye conditions seen in all age groups, from infants to older adults.
Most people know it as pink eye or eye flu. The eye looks red or pink because the blood vessels in the conjunctiva dilate during inflammation.
Conjunctivitis is not usually dangerous. But it is uncomfortable, often contagious, and sometimes confused with other eye conditions that need urgent attention.
Dr Shibal Bhartiya is a fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator with over 25 years of experience. Her approach focuses on identifying risk before damage is irreversible, simplifying treatment decisions, and protecting vision long-term. Emphasis on early detection, risk assessment, and continuity of care. She is rated 5 stars across 1,500+ patient reviews on Google.
Types of Conjunctivitis
Conjunctivitis is not one condition. The cause determines the treatment.
Viral conjunctivitis is the most common type. It spreads easily from person to person and is often associated with a cold or upper respiratory infection. It usually resolves on its own within one to two weeks.
Bacterial conjunctivitis causes a sticky yellow or green discharge. It responds to antibiotic eye drops. Without treatment, it can persist and occasionally spread to the cornea.
Allergic conjunctivitis is not infective and not contagious. It is triggered by dust, pollen, pet dander, or other allergens, and can cause intense itching. It is often seasonal. You can read more about it on the eye allergy page.
Chemical or irritant conjunctivitis results from exposure to chlorine, smoke, fumes, or foreign bodies. It is not contagious and resolves once the irritant is removed.
Symptoms of Conjunctivitis
Symptoms vary slightly by cause but the common features include:
- Redness of one or both eyes
- Watering or discharge
- Gritty or sandy feeling in the eye
- Swelling of the eyelids or conjunctiva
- Sticky eyelids on waking, especially with bacterial infection
- Transient blurring of vision
- Intense itching, more common in allergic conjunctivitis
When to See a Doctor Immediately
Most conjunctivitis is mild. But some symptoms need prompt attention:
- Severe pain in the eye
- Significant reduction in vision that does not clear with blinking
- Intense sensitivity to light
- Symptoms that worsen rapidly or do not improve after a week
- Conjunctivitis in a newborn
These symptoms may point to a more serious condition such as corneal involvement, uveitis, or acute glaucoma — all of which need urgent evaluation.
Management of Conjunctivitis
Treatment depends on the cause.
For viral conjunctivitis, antibiotics are not effective. Treatment focuses on comfort — preservative-free lubricating eye drops reduce irritation, and cold compresses ease swelling. Most cases resolve within 7 to 14 days.
For bacterial conjunctivitis, your doctor will prescribe antibiotic eye drops or ointment. Complete the full course even if symptoms improve early.
For allergic conjunctivitis, antihistamine eye drops and avoidance of triggers form the core of treatment. Anti-inflammatory drops help in more severe cases.
In some situations — particularly in diabetic or immunocompromised patients — a doctor may prescribe a broad-spectrum antibiotic even for a viral infection to prevent secondary bacterial infection.
How to Limit the Spread
Viral and bacterial conjunctivitis spread through direct and indirect contact. These steps reduce transmission:
- Wash hands frequently, especially after touching the eyes
- Do not touch or rub the infected eye
- Do not share towels, pillowcases, or eye makeup
- Avoid contact lenses until your doctor confirms it is safe to resume
- Stay away from school or work if discharge is heavy — particularly in children
A Note on Self-Treatment
Many patients use over-the-counter antibiotic or steroid drops without a prescription. This is not advisable. Steroid drops used without examination can worsen viral infections and occasionally trigger serious complications including raised eye pressure and glaucoma. Always have a comprehensive eye examination before starting any treatment.
Frequently Asked Questions- Conjunctivitis (Pink Eye)
Is conjunctivitis contagious?
Viral and bacterial conjunctivitis can spread through:
• Hand contact
• Towels
• Cosmetics
• Eye rubbing
• Close contact environments like schools and offices
Allergic conjunctivitis is not contagious.
Good hygiene significantly reduces transmission risk.
What is the treatment for conjunctivitis?
Treatment depends on the cause:
• Viral conjunctivitis → lubrication and hygiene
• Bacterial conjunctivitis → antibiotic drops when indicated
• Allergic conjunctivitis → anti-allergy medication, low dose steroids depending on severity
• Dry eye related redness → tear film stabilisation
Steroid eye drops should never be used without ophthalmologist supervision because they can worsen infections and may trigger glaucoma in susceptible individuals.
How long does conjunctivitis take to recover?
Recovery depends on cause:
• Viral conjunctivitis: 7–14 days
• Bacterial conjunctivitis: 5–10 days
• Allergic conjunctivitis: depends on allergen control
If symptoms persist beyond expected timelines, further evaluation may be needed to rule out masqueraders.
When should I see an eye specialist urgently?
Seek urgent consultation if you have:
• Reduced vision
• Severe eye pain
• Light sensitivity
• Recurrent episodes
• No improvement after 3–5 days
• History of glaucoma
• Contact lens use with redness
These may indicate conditions more serious than conjunctivitis.
Can conjunctivitis affect vision permanently?
Most cases recover fully. However delayed diagnosis, inappropriate steroid use, or missed alternative diagnoses may rarely cause complications.
Early diagnosis helps prevent unnecessary risk.
How do ophthalmologists differentiate conjunctivitis from more serious causes of red eye?
Clinical examination typically includes:
• Visual acuity testing
• Slit lamp examination
• Corneal evaluation
• Anterior chamber assessment
• Eye pressure measurement when needed
• Risk stratification based on symptoms
The key clinical question is often not just how to treat redness, but whether this is truly conjunctivitis or something more serious.
How can conjunctivitis be prevented?
Prevention strategies include:
• Hand hygiene
• Avoid eye rubbing
• Avoid sharing towels
• Replace eye cosmetics after infection
• Proper contact lens care
• Early consultation if symptoms worsen
Preventive eye care remains the most effective strategy to avoid complications.
Is pink eye the same as conjunctivitis?
Yes. Pink eye is the common name for infective conjunctivitis. The term refers to the characteristic redness caused by dilated surface blood vessels.
Can steroid eye drops treat conjunctivitis?
Steroid drops should only be prescribed by an eye doctor after examination. Used incorrectly, steroids can worsen viral conjunctivitis, delay healing, and raise eye pressure — increasing the risk of glaucoma.
How is conjunctivitis different from dry eye or allergy?
All three cause red, uncomfortable eyes. Dry eye causes burning and grittiness, worse with screen use. Allergy causes intense itching, often with sneezing. Infective conjunctivitis typically causes discharge and may affect one eye first. An eye examination is the reliable way to distinguish them.
Read the research articles
This article was written by Dr Shibal Bhartiya, fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator, Clinical Director at Marengo Asia Hospitals, Gurugram, known for ethical, patient-centred glaucoma care and independent glaucoma second opinions.
She has published peer-reviewed research on eye care, examining how treatment decisions should balance medical evidence, patient preferences, and long-term vision outcomes.
As Editor-in-Chief of Clinical and Experimental Vision and Eye Research and Executive Editor of the Journal of Current Glaucoma Practice (Pubmed Indexed, official journal of the International Society of Glaucoma Surgery), Dr Shibal Bhartiya brings editorial and research depth to every clinical decision. Her 200+ publications, including 90+ PubMed-indexed publications and 28 edited textbooks span glaucoma biology, surgical outcomes, health equity, and emerging diagnostics.
Her work can be accessed on Pubmed, Google Scholar, ResearchGate and ORCID.
Dr Shibal Bhartiya
Glaucoma • Second Opinion • Advanced Care
www.drshibalbhartiya.com
+91 88826 38735
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Is My Itchy Red Eye an Eye Allergy?
Quick Answer: Yes, if both eyes itch, water and look red, an eye allergy is the most likely cause. Pain, blurred vision or thick yellow discharge suggest something else, so see an eye doctor.
Eye allergy, or allergic conjunctivitis, is not contagious. Cold compresses, preservative-free lubricating drops and avoiding triggers relieve most mild cases. Steroid drops are the exception. They can raise eye pressure, so use them only after an eye examination.
Dust, pollution, pollen and air conditioning often hit your eyes on the same day in Gurgaon. That is why allergic eye disease is one of the most common complaints in my clinic. It also rarely travels alone. Allergy and dry eye feed each other, and treating one often means treating both.
Dr Shibal Bhartiya is a fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator with over 25 years of experience. Her approach focuses on identifying risk before damage is irreversible, simplifying treatment decisions, and protecting vision long-term. Emphasis on early detection, risk assessment, and continuity of care. She trained in both cornea and glaucoma at AIIMS, which is why she treats the ocular surface as part of eye care, not a side issue. She is rated 5 stars across 1,600+ patient reviews on Google.
How Do I Know It Is an Allergy and Not an Infection?
Look at the itch first. Allergies itch. Infections hurt, sting or feel gritty.
| Eye allergy | Infective conjunctivitis | |
|---|---|---|
| Itching | Intense | Mild or absent |
| Discharge | Clear, watery or stringy | Sticky, yellow or green |
| Both eyes | Usually | Often starts in one eye |
| Contagious | No | Often yes |
| Cold or fever | Rarely | Sometimes |
If you cannot tell, see a doctor before you put in any drops. The wrong drop can make an infection worse.
What Causes Eye Allergy in Gurgaon?
Your immune system reacts to something that landed on the eye surface. Mast cells in the conjunctiva release histamine. Histamine causes the itch, redness and watering.
Seasonal triggers. Pollen from grasses, trees and weeds. In Delhi-NCR, spring and the post-monsoon weeks are the worst. Mould spores flare symptoms during the monsoon.
Year-round triggers. Dust mites, pet dander, cockroach allergens, smoke and vehicle exhaust. A poorly maintained air conditioner recirculates allergens instead of filtering them.
Contact triggers. Eye makeup, contact lens solutions, preservatives in eye drops and skin creams that drift toward the eyes. Patients often mistake these reactions for infection.
Vernal keratoconjunctivitis. A severe, chronic form that mostly affects young boys in hot climates. It causes intense itching, ropy mucus and cobblestone bumps under the upper eyelid. It can damage the cornea, so it needs specialist care.
Eye Allergy Symptoms: What They Mean and When to Worry
| Symptom | Likely cause | When to worry |
|---|---|---|
| Intense itching in both eyes | Allergic conjunctivitis | If it disturbs sleep or lasts beyond a few days of self-care |
| Puffy eyelids on waking | Allergen exposure overnight | If one eyelid swells, turns red or feels warm |
| Watering and redness | Histamine release | If redness comes with pain or reduced vision |
| Gritty, burning feeling | Allergy with dry eye | If drops give no relief after a few days |
| Mild light sensitivity | Surface inflammation | If light hurts and the eye is painful |
| Ropy, stringy mucus | Vernal keratoconjunctivitis | Always see a specialist, especially in children |
| Thick yellow or green discharge | Infection, not allergy | See a doctor before using any drops |
How Is Eye Allergy Treated?
Start with the trigger. Removing the cause works better than any drop.
- Wear wrap-around sunglasses outdoors. They block pollen and dust.
- Keep windows shut in high-pollen weeks and use an air purifier indoors.
- Wash pillowcases often, because dust mites live in bedding.
- Remove eye makeup every night. Stop any new product you started just before symptoms began.
- Use a cold compress. A clean cotton pad soaked in cold water, held on closed eyes, calms itching fast.
- Skip contact lenses until the eyes settle.
Then add drops in steps.
- Preservative-free lubricating drops wash allergens off the surface and ease dryness. They are safe to use often and are usually the first step.
- Antihistamine drops block histamine and relieve itching and redness quickly.
- Mast cell stabiliser drops stop histamine release. Start them before the season and use them daily. They do not work for sudden relief.
- Combination drops contain both actions. They suit most patients with seasonal disease.
- NSAID drops reduce inflammation without the risks of steroids.
- Oral antihistamines help when you also have a blocked nose or skin symptoms.
Avoid “get the red out” drops. They hide redness, then cause rebound redness when they wear off.
Steroid Eye Drops and Your Eye Pressure
Steroid drops work well for severe allergy. Even short courses can raise eye pressure in some people. Prolonged use can also cause cataract and make infections worse.
Tell your doctor before you start steroid drops if any of these apply:
- You have glaucoma.
- A parent, brother or sister has glaucoma.
- Someone has told you your eye pressure is high.
Steroid-induced glaucoma is preventable. Prevention depends on your doctor knowing your risk and checking your eye pressure during treatment. Read more about steroid-induced glaucoma.
Do not buy steroid drops over the counter. If you have used pharmacy steroid drops for more than two weeks, book an eye pressure check.
What Doctors Often Miss
- Dry eye hides inside allergy. Treating only the itch leaves the tear film problem untouched, so symptoms return.
- Infection gets labelled allergy. Treat a red eye with discharge as allergy and you can miss a corneal infection.
- Children rub for other reasons. An uncorrected glasses prescription also makes children rub their eyes. The two problems often coexist.
- Repeat antibiotic drops do nothing for allergy. If the itch keeps returning, the diagnosis needs a second look.
When Should You See a Doctor?
See a Doctor Urgently
- Severe eye pain
- Sudden blurred or reduced vision
- Marked light sensitivity with a painful red eye
- Red eye in a contact lens wearer with pain or discharge
- Any chemical splash or injury to the eye
See a Doctor
- Symptoms last beyond a few days of self-care
- Thick yellow or green discharge
- Symptoms return every season
- A child rubs the eyes often
- You have used pharmacy steroid drops for more than two weeks
- Antihistamine drops give no relief
Eye Rubbing and Children
Children with allergy rub constantly. Parents often assume infection and reach for antibiotic drops. Antibiotics do nothing for allergy.
The bigger danger is the rubbing itself. Hard, repeated rubbing can contribute to keratoconus, a thinning and bulging of the cornea. Read why you should not rub your eyes.
If your child’s eyes itch every season, book an eye examination. Check for refractive error at the same visit.
What This Means for You
If both eyes itch and water, start with a cold compress and preservative-free drops. Remove the trigger you can find. Do not use steroid drops without an eye pressure check. If pain, blurred vision or discharge appear, stop self-treating and see a doctor. For other causes, read why are my eyes red.
Frequently Asked Questions
How do I know if my red itchy eye is an allergy or an infection?
Allergy causes intense itching, clear watery discharge and symptoms in both eyes. Infection causes thick coloured discharge and often starts in one eye. An examination confirms the cause.
Is eye allergy contagious?
No. You cannot catch it from another person or pass it on.
Can dust and pollution in Gurgaon make eye allergy worse?
Yes. Dust, vehicle exhaust and construction particles are common year-round triggers in Delhi-NCR. Wrap-around sunglasses outdoors and preservative-free drops after exposure reduce the allergen load.
What eye drops treat eye allergy?
Preservative-free lubricants dilute allergens. Antihistamine drops relieve itching. Mast cell stabilisers prevent flares. NSAID drops reduce inflammation. Steroid drops are for severe cases under medical supervision.
Are steroid eye drops safe for eye allergy?
They are safe only under supervision. Steroid drops can raise eye pressure and cause cataract. Your doctor should check your eye pressure before and during treatment.
Can eye rubbing during an allergy attack cause long-term damage?
It can. Repeated hard rubbing is a recognised risk factor for keratoconus. Cold compresses and antihistamine drops relieve the itch more safely.
Itchy Eyes That Keep Coming Back?
Repeated allergy flares, or a drop you are unsure about, deserve a proper eye examination. Dr Shibal Bhartiya examines the ocular surface and checks eye pressure in the same visit.
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This article is part of the Dry Eye Hub. Please also read Basics of Dry Eye, Dry Eye Second Opinion and Dry Eye: A Chronic Disease. Why Vision Becomes Blurred After Reading or Screen Use, Why Dry Eye Symptoms and Tests Don’t Match, and Why Are Your Dry Eye Drops Not Working may also help you understand your problem better.
You may also want to read this article written by Dr Bhartiya for NDTV online. And listen to her talk about dry eyes here.
About the Author
This article was written by Dr Shibal Bhartiya, fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator, Clinical Director at Marengo Asia Hospitals, Gurugram, known for ethical, patient-centred glaucoma care and independent glaucoma second opinions. She is also the Program Director for Community Outreach & Wellness; and for the Marengo Asia International Institute of Neuro and Spine.
Dr Bhartiya has published peer-reviewed research onglaucoma management, examining how treatment decisions should balance medical evidence, patient preferences, and long-term vision outcomes. She is also a committed patient advocate and mainstream medical columnist, translating complex ophthalmic evidence into actionable public health insights across leading national platforms including NDTV and OnlyMyHealth
As Editor-in-Chief of Clinical and Experimental Vision and Eye Research and Executive Editor of the Journal of Current Glaucoma Practice (Pubmed Indexed, official journal of the International Society of Glaucoma Surgery). Her 200+ publications, including 90+ PubMed-indexed publications and 28 edited textbooks span glaucoma biology, surgical outcomes, health equity, and emerging diagnostics.
1600+ Five Star Patient Reviews Google Business Profile
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Last Reviewed: October 2026