Eye redness

Eye redness occurs when the vessels in your eye become swollen or irritated. Redness of the eye, also called bloodshot eyes, can indicate the presence of several different health problems. While some of these problems are benign, others are serious and require emergency medical attention. The redness of your eye may be a cause for concern. However, most serious eye problems happen when you have redness along with pain or changes in your vision. 

Symptoms:

  • Bright red spot visible in the eye.
  • Eyes feel dry, itchy, scratchy, irritated and sometimes burning sensation.
  • Sensation of a foreign body in the eye.
  • Sores or ulcers appear on your cornea.

Causes:

  • Allergies
  • Blepharitis (eyelid inflammation)
  • Chalazion (a type of cyst on your eyelid)
  • Corneal abrasion (scratch): First aid
  • Corneal herpetic infections (herpes)
  • Corneal ulcer
  • Dry eyes (decreased production of tears)
  • Ectropion (outwardly turned eyelid)
  • Entropion (inwardly turned eyelid)
  • Episcleritis (inflammation of the membrane covering the white part of the eye)
  • Eyedrops
  • Foreign object in the eye: First aid
  • Glaucoma (group of conditions that damage the optic nerve)
  • Hay fever (allergic rhinitis)
  • Injury, such as from a blunt trauma or burn
  • Iritis (inflammation of the colored part of the eye)
  • Keratitis (inflammation of the cornea)
  • Orbital cellulitis (severe infection of tissues around the eye)
  • Pink eye (conjunctivitis)
  • Scleritis (inflammation of the white part of the eye)
  • Sty (a red, painful lump near the edge of your eyelid)
  • Subconjunctival hemorrhage (broken blood vessel in eye)
  • Uveitis (inflammation of the middle layer of the eye)