Conjunctivitis is a common condition that causes redness and inflammation of the thin layer of tissue that covers the front of the eye (the conjunctiva).
The conjunctiva can become inflamed as a result of:
- a bacterial or viral infection – this is known as infective conjunctivitis
- an allergic reaction to a substance such as pollen or dust mites –this is known as allergic conjunctivitis
- the eye coming into contact with things that can irritate the conjunctiva, such as shampoo or chlorinated water, or a loose eyelash rubbing against the eye – this is known as irritant conjunctivitis
- Treatment isn’t usually needed for conjunctivitis, because the symptoms often clear up within a couple of weeks. If treatment is needed, the type of treatment will depend on the cause. In severe cases, antibiotic eye drops can be used to clear the infection.
- Irritant conjunctivitis will clear up as soon as whatever is causing it is removed.
- Allergic conjunctivitis can usually be treated with anti-allergy medications such as antihistamines. If possible, you should avoid the substance that triggered the allergy.
- It’s best not to wear contact lenses until the symptoms have cleared up. Any sticky or crusty coating on the eyelids or lashes can be cleansed with cotton wool and water.
- Washing your hands regularly and not sharing pillows or towels will help prevent it spreading.