It can be concerning to notice a red patch or general redness in the sclera, or white of the eye. Whether it appears suddenly or gradually, red eyes are one of the most common eye-related symptoms people experience.
The good news is that many causes are harmless and easily treatable—while others may require medical attention.
In this blog, we’ll explore what causes red eyes, when to worry, and how to care for your eyes when redness strikes.

Red Eyes
Redness in the sclera typically indicates increased blood flow resulting from irritation, inflammation, or broken blood vessels. The redness can range from mild pinkish tones to deep red patches and can affect one or both eyes.
The appearance can vary:
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- A diffuse, even redness may point to irritation or infection.
- A bright red spot may signal a subconjunctival hemorrhage (a broken blood vessel).
- A more serious condition may be indicated by redness that is accompanied by pain, discharge, or changes in vision.
Common Causes of Red Eyes
Dry Eyes
When your eyes don’t produce enough tears or the quality of your tears is poor, the surface of the eye becomes dry and irritated, leading to redness and distress.
Allergies
Allergic reactions to pollen, dust, pets, or cosmetics can cause the eyes to become red, itchy, watery, and swollen.
Eye Fatigue or Strain
Prolonged screen time, reading in poor lighting, or a lack of sleep can strain the eyes and cause them to appear red or bloodshot.
Conjunctivitis (Pink Eye)
This is an inflammation or infection of the conjunctiva—the clear tissue that covers the white of the eye. It is frequently contagious and can be brought on by germs, viruses, or allergies.
Subconjunctival Hemorrhage
A sudden bright red spot may be the result of a broken blood vessel beneath the surface of the eye. Although it may look dramatic, it’s usually harmless and resolves on its own within 1–2 weeks.
Contact Lens Wear
Long-term lens wear, sleeping in them, and poor cleaning can irritate the eye and cause redness or infection.
Injury or Trauma
Rubbing your eyes forcefully, getting hit in the eye, or exposure to foreign objects can cause redness, swelling, or even internal damage.
Infections
Conditions like uveitis or keratitis (inflammation of inner eye structures or the cornea) can cause severe redness, pain, and vision problems. These require immediate medical attention.
When Should You See a Doctor?
While slight redness can often be managed at home, you should contact an eye doctor if you experience any of the following:
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- Unexpected changes in vision, such as blurriness, double vision, or blindness
- Eye pain or a gritty feeling
- Sensitivity to light (photophobia)
- Discharge or crusting around the eye
- Swelling around the eye or eyelids
- Redness that doesn’t go away in a couple of days
- You suspect an object or chemical entered your eye
Paying attention can help prevent complications, especially if an infection or eye disease is involved.
Red Eyes Treatment and Home Care Tips
Depending on the cause of the redness, treatment can vary. Here are some general home remedies and care tips:
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- Use Artificial Tears: Over-the-counter lubricating eye drops can relieve dryness and flush out allergens or irritants.
- Apply a Cold Compress: A clean, cool compress can reduce inflammation and soothe itchy, red eyes.
- Rest Your Eyes: Reduce screen time and get plenty of sleep to give your eyes a break.
- Practice Good Hygiene: Wash your hands often and avoid touching or rubbing your eyes—especially if you suspect pink eye or allergies.
- Avoid Irritants: Stay away from smoke, strong perfumes, or harsh cleaning products that can trigger irritation.
- Switch to Glasses Temporarily: If you wear contacts, give your eyes a break by switching to glasses until the redness subsides.
Important: Do not use “redness relief” drops long-term. These products can cause rebound redness and may mask more serious problems.
When to See an Eye Doctor
If over-the-counter solutions don’t help—or if your symptoms are severe or persistent—it’s time to consult an eye care provider. They can perform tests to evaluate your tear production and quality and may recommend prescription eye drops, punctal plugs (to keep tears on the eye longer), or other advanced treatments.
Early diagnosis and personalized care can dramatically improve comfort and protect your long-term eye health.
How to Prevent Red Eyes
You can’t prevent every case of red eye, but you can lower your risk by:
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- Staying hydrated
- Wearing protective eyewear when needed
- Taking regular screen breaks (use the 20-20-20 rule)
- Replacing makeup and contact lenses regularly
- Getting regular comprehensive eye exams
Conclusion
When the white of your eye turns red, it’s your body’s way of telling you something is off. Whether it’s dryness, allergies, or a more serious issue, paying attention to red eyes is important for protecting your vision and overall eye health.
In most cases, red eyes are nothing to fear—but if you’re unsure, it’s always wise to consult an eye care professional. Take a moment to show your eyes some appreciation for all that they do for you each day.
Worried about your red eyes? Call us to make an appointment with our eye doctors, Dr. Jeffrey Porter and his associates.
Our experienced eye doctors in Crystal Lake and Algonquin, IL, are dedicated to providing exceptional eye checkups to residents of Crystal Lake, Algonquin, Illinois, and surrounding areas.
Walmart Vision Center Crystal Lake, IL
815-477-4053
Walmart Vision Center Algonquin, IL
847-458-5796
