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  1. Red eye Causes - Mayo Clinic

    Feb 19, 2025 · This eye condition often looks much worse than it feels. Find out possible causes of inflamed, irritated eyes and when to call the doctor.

  2. 22 Causes of Red Veins in Eyes - Verywell Health

    Jun 3, 2025 · Red veins in eyes can result from issues like allergies, dry eye syndrome, or pink eye. While many cases of bloodshot eyes are harmless, others can be serious.

  3. Red and Bloodshot Eyes: Common Causes, Treatment - WebMD

    Jan 28, 2024 · Your eyes get red when the tiny blood vessels on the whites of your eyes expand and turn the whites pink or red. Learn about the causes & treatments for red eyes.

  4. 20 Causes, Symptoms, and Complications of Red Eyes - Healthline

    Feb 15, 2024 · Red eyes occur when the vessels in your eye become swollen or irritated. Discover when to see a doctor, treatment, and more.

  5. Red Eye: Causes, Treatment & Prevention - Cleveland Clinic

    Jan 23, 2023 · Red eye describes an eye that’s irritated or bloodshot. You can treat some cases of eye redness with home remedies, like artificial tears and cool compresses over the eyes.

  6. Eye redness: MedlinePlus Medical Encyclopedia

    Bloodshot eyes appear red because the vessels at the surface of the white portion of the eye (sclera) become swollen. Vessels may swell due to: Eye dryness Too much sun exposure …

  7. Red Eyes: Causes and Treatment for Bloodshot Eyes - All About …

    Dec 14, 2023 · Red, bloodshot eyes can be caused by eye conditions and environmental or lifestyle factors. Learn how to treat and soothe this common eye concern.

  8. Why Are Your Eyes Bloodshot? 12 Causes and Treatment - Health

    Oct 30, 2025 · Causes of bloodshot eyes include allergies, dry eye, pink eye, glaucoma, and more. Treatments include eye drops, antibiotics, or, in severe cases, surgery.

  9. Quick Facts:Eye Redness - Merck Manual Consumer Version

    Red eyes are usually caused by an infection or allergy You may have other eye symptoms along with redness, such as watery or itchy eyes, eye pain, a feeling like something's in your eye, or …

  10. Red and Bloodshot Eyes: Causes, Treatment, and Prevention - GoodRx

    Jun 25, 2024 · Red or bloodshot eyes can be caused by many conditions, such as allergies, dryness, or infections. Learn why your eyes may be red and how to treat bloodshot eyes.

  11. Why Do Your Eyes Look Red? 10 Causes and Treatment - Vision …

    Oct 9, 2024 · However, red eyes with severe pain and/or vision problems can indicate a serious condition that needs emergency medical care. Without treatment, some causes of bloodshot …

  12. Red Eyes Explained: Symptoms, Causes, and Remedies

    Dec 24, 2024 · Red-eyes symptoms, causes, and remedies. Understand effective treatments, home care tips, and preventive measures to maintain eye health.

  13. 10 Causes Of Red Eyes And Their Treatment Options | Credihealth

    May 14, 2025 · The causes of red eye include allergies, blepharitis (inflamed eyelid), conjunctivitis (pink eye), dry eye, eye damage, and glaucoma. Learn more.

  14. Can Bloodshot Eyes Be Serious? When to Seek Help

    Oct 13, 2025 · Red eyes with severe pain or sensitivity to light can be signs of a serious eye condition. If your red eyes don't get better in a few days or come with other symptoms, see a …

  15. Red Eyes: Causes, Treatments & When to See a Doctor | Bloodshot Eyes

    Sep 3, 2021 · Common red eye causes include irritation, infection or trauma. Even everyday causes, such as coughing, sneezing, crying, dehydration and lack of sleep, can lead to …

  16. Red eyes: List of common causes - Medical News Today

    Oct 24, 2023 · In this article, learn about some common causes of red eyes, including conjunctivitis, corneal ulcers, dry eye syndrome, and subconjunctival hemorrhage.

  17. Red Eye - Eye Disorders - Merck Manual Professional Edition

    Etiology of Red Eye The most common causes of red eye include Infectious conjunctivitis Allergic conjunctivitis Corneal abrasions and foreign bodies are common causes (see table Some …

  18. Why Are My Eyes Always Red? - Cleveland Clinic Health Essentials

    Jul 15, 2024 · Red eyes are usually caused by easily treated issues like allergies or pink eye. But if you’re in pain or your vision’s changing, it could be more serious.

  19. Quick Facts: Eye Redness - MSD Manual Consumer Version

    Red eyes are usually caused by an infection or allergy You may have other eye symptoms along with redness, such as watery or itchy eyes, eye pain, a feeling like something's in your eye, or …

  20. Red eye Causes - Mayo Clinic

    Oct 17, 2024 · Red eye is a common problem that can happen in one or both eyes. The redness comes from the blood vessels on the surface of the eye. These blood vessels expand due to …

  21. Red-eye effect - Wikipedia

    The red-eye effect occurs in the eyes of humans when a photography flash is used in low light or at night. [1][2] The flash travels through the eyes and rebounds at the rear of the eye, turning …

  22. Blepharitis (Eyelid Inflammation): Causes & Treatment

    Dec 20, 2022 · Blepharitis, the medical term for irritated, swollen eyelids, is a common condition. The edges of your lids turn red or dark in color and become swollen and scaly.

  23. Weed Eyes: The Science of Red Eyes and Cannabis - Munchies!

    Dec 23, 2025 · Why does weed make your eyes red? Learn the real science behind red eyes, how edibles affect them, and simple ways to reduce redness from cannabis use.

  24. What Is the Difference Between a Stye and a Chalazion?

    Mar 24, 2025 · Got a painful bump on your eyelid? Learn the difference between chalazia and styes, how to treat them safely at home, and when to see an eye doctor.

  25. Yellow Eyes: Causes, Diagnosis, and Treatment - Verywell Health

    Nov 13, 2025 · Learn about the causes of yellow eyes, including conditions like jaundice, subconjunctival hemorrhage, and leptospirosis.

  26. Dry eyes - Symptoms & causes - Mayo Clinic

    Sep 23, 2022 · Eyes feeling dry and uncomfortable? Inadequate tear production is a common — and very treatable — eye condition. Find out what causes it and how to relieve symptoms.