Health Tip: Why Are My Eyes Red?

(HealthDay News) -- Eye redness occurs when blood vessels on the surface of the eye become dilated.

Here are some common causes of red eyes, courtesy of the U.S. National Library of Medicine:

  • Straining the eyes.
  • Persistent or severe coughing.
  • An eye infection.
  • A cold or allergy.
  • Damage to the eye.
  • Acute glaucoma.
  • Scratches on the cornea, commonly caused by wearing contact lenses too long, or sand or dust in the eyes.
  • Bleeding problems, often caused by taking blood-thinning drugs.

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