1. Allergies
  2. Blepharitis (inflammation that affects your eyelids)
  3. Blocked tear duct
  4. Chalazion (a type of cyst on your eyelid)
  5. Contact lens problem
  6. Corneal abrasion (rubbing off of the very top layers of the cornea, the transparent cover of your eye)
  7. Dry eyes
  8. Ectropion (condition in which your eyelid turns out)
  9. Entropion (condition in which your eyelid turns in)
  10. Foreign object in eye
  11. Glaucoma (group of conditions, often the result of pressure inside your eye, causing nerve damage)
  12. Cluster headache
  13. Injury, such as from a blunt trauma or burn
  14. Iritis (inflammation of the colored part of the eye)
  15. Optic neuritis (inflammation of the optic nerve)
  16. Pink eye (conjunctivitis) (inflammation or infection of the transparent membrane that lines your eyelid and covers the white part of your eyeball)
  17. Scleritis (inflammation of the sclera, the tough white outer part of your eyeball)
  18. Sty (a red, painful lump near the edge of your eyelid)
  19. Uveitis (inflammation of the middle layer of the eye)

Causes shown here are commonly associated with this symptom. Work with your doctor or other health care professional for an accurate diagnosis.

Mar. 01, 2013