Injury, infection and allergy are the most common causes of discomfort or irritation of the eye and eyelids. A painless red area in the white of the eye is likely to be a burst blood vessel and should clear up without treatment. However, you should see your doctor if your eyes are sore. Consult your doctor immediately if your vision deteriorates.

WARNING: Contact Lens Wearers - If you wear contact lenses and experience any kind of eye pain or irritation, remove your lenses without delay and do not use them again until the cause of the problem has been identified and treated. If the pain is caused by grit under the lens, there is a risk that the cornea will be scratched. Make an appointment to see your opthalmologist.