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Medically Reviewed
Written by Pooja Rawat, Medical Content Writer
Why eyes get red is a very common question, and in most cases, the answer is surprisingly simple: the tiny blood vessels on the surface of your eye get enlarged or inflamed due to irritation, dryness, allergies, infection, fatigue, or injury. A “red eye” is a general term to describe red, irritated and bloodshot eyes.
Many cases of eye redness are relatively harmless and generally improve with home remedies or over-the-counter treatments. But if your eye or eyes remain red for longer than one week and you notice other symptoms such as sudden vision changes, light sensitivity, swelling, severe headache, nausea, or vomiting, it needs prompt medical attention. Because they can be a sign of a more serious eye problem, and only an eye doctor can give you the correct answer to why your eyes get red.
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Causes Red Eyes
Your eyes can look red when the small blood vessels in the white part of the eye, known as the sclera, become swollen or more visible.
Red eyes have many different causes, such as dust, lack of sleep, dry air, an infection, inflammation, an injury, or another eye condition.
| Common cause | Other symptoms you may notice | Usually serious? |
| Dry eyes | Burning, gritty feeling, irritation | Usually no |
| Allergies | Itching, watering, sneezing | Usually no |
| Lack of sleep | Tired, dry or irritated eyes | Usually no |
| Pink eye | Discharge, itching, watering | Sometimes needs treatment |
| Contact lenses | Irritation, redness, discomfort | Can be serious |
| Eye injury | Pain, watering, sensitivity | May require urgent care |
| Glaucoma | Severe pain, blurred vision, halos | Can be an emergency |
| Uveitis or other inflammation | Pain, light sensitivity, blurred vision | Needs medical evaluation |
Note: Eye redness alone doesn’t tell you what is exactly wrong. Other symptoms give important clues.
Why Do Your Eyes Get Red?
Your eyes can get red because of trigger factors such as dust and dirt, smoke, pollen, pet dander, chlorine, dry air, too much screen time, contact lenses, eye rubbing, certain eye drops, lack of sleep, and infections and eye injuries.
When these factors irritate your eye’s surface, the tiny blood vessels respond by becoming wider. More visible blood vessels can make the white part of the eye look pink or bright red.
Why Do Eyes Get Red After Sleeping?
Poor sleep can contribute to tired-looking, bloodshot eyes. Allergens in bedding, dust, a dry room, or sleeping with your eyes partially open may additionally cause irritation.
Why Do Eyes Get Red Suddenly?
Getting something in your eye, rubbing your eye, exposure to smoke or chemicals, an allergic reaction, wearing contact lenses for too long, an eye injury, a burst surface blood vessel and sudden inflammation or infection – all these can contribute to eyes getting red suddenly.
Symptoms Accompanying Red Eyes
Redness may appear by itself, but other symptoms (such as itching, watery eyes, sticky discharge, burning, pain, etc.) can help identify what may be happening.
| Symptom | Possible causes |
| Itching | Allergies, irritation |
| Watery eyes | Allergies, irritation, infection |
| Sticky discharge | Conjunctivitis or infection |
| Burning | Dry eye, irritation |
| Pain | Injury, inflammation, infection, glaucoma |
| Blurred vision | Corneal problems, inflammation, glaucoma |
| Light sensitivity | Inflammation, corneal problems |
| Swelling | Allergy, infection, inflammation |
| Bright-red patch | Broken surface blood vessel |
How to Treat Red Eyes at Home
If the redness is mild and there are no warning signs, remedies for red eyes are wide-ranging, and often they’re things you can do at home for yourself.
1. Give your eyes a break
If your eyes are tired from screens or prolonged concentration, make a conscious decision to take regular breaks and allow your eyes to rest.
2. Try a cool compresses over closed eyes
Place a clean, cool washcloth over your closed eyes for several minutes. This can help lower irritation and offer temporary comfort.
3. Consider artificial tears
Over-the-counter artificial tears (preservative-free artificial tears) can help lubricate dry or irritated eyes. Ask an eye doctor if you’re unsure which product is appropriate.
4. Don’t rub your eyes
Rubbing can make irritation and redness worse. Additionally, rubbing may introduce germs or particles into the eye. Therefore, refrain from rubbing your eyes.
Instead, gently wash your eyelids and lightly massage them.
5. Avoid the trigger
Limit exposure to smoke, dust, pollen, chlorine, cosmetics, or other substances if they appear to be causing the redness.
6. Take care with contact lenses
Don’t wear contact lenses longer than recommended. If you develop severe redness or pain while wearing contacts, remove them and seek an ophthalmologist, particularly if vision is affected.
Seek urgent medical care if red eyes occur with:
- Sudden changes in vision
- Severe or significant eye pain
- Severe headache
- Nausea or vomiting
- Strong sensitivity to light
- Halos around lights
- Significant swelling
- A penetrating eye injury
- Chemical exposure
- Inability to open or keep the eye open
FAQs
Why do eyes get red after a shower?
Why do eyes get red after drinking alcohol?
Why do eyes get red when high?
Conclusion
So, if you ask why my eyes get red? Redness happens because the tiny blood vessels on the eye’s surface become enlarged or inflamed in response to irritation, dryness, allergies, fatigue, infection, or injury.
However, if the redness is combined with pain, vision changes, light sensitivity, swelling, or severe symptoms, you should contact your eye doctor immediately.
Seek immediate medical care if:
- Your eyesight changes suddenly.
- Red eye is accompanied by a bad headache, eye pain, fever or if light starts to hurt your eyes.
- You also have an upset stomach or are throwing up.
- Your eye is red after a penetrating injury or a chemical splashed in your eye.
- You suddenly start to see circles around lights.
- You are very sensitive to light.
- You feel as if something is in your eye.
- You have swelling in or around your eye.
- You are unable to open or keep your eye open.
Disclaimer: This blog is for informational use only. For accurate information about why eyes get red, consult your ophthalmologist only.