Tearing or production of tears is a normal function of the eyes. Tears are produced by tear glands present above the outer eye and are made of water, antibiotics and oil. They keep the surface of the eye moist and protect it from foreign bodies. Excessive tearing in the eye is not normal and can be caused by:

  • Blockage of the tear ducts (an opening through which tears come out from the eye)
  • Allergic reactions to dust, mould or dander
  • Turning in or out of the eyelid
  • Conjunctivitis (infection of the membrane lining the eye)
  • Bright light
  • Infections or irritations
  • Smog or chemicals present in the environment
  • Eyestrain, vomiting, laughing or yawning
  • Dry eyes

Tearing can be treated with the help of eye drops, warm compresses or medications. Problems with tear drainage are usually treated surgically.