minderjinx Not all conjuctivitis is infectious, there is allergic and infective.
Infective conjunctivitis is caused by infection of your eye with bacteria or a virus.
Sometimes babies develop conjunctivitis in the first few weeks after they are born. This can happen if an infection is passed from the mother's cervix (neck of her womb) or vagina during delivery, or if the baby has a reaction to a treatment applied to his or her eye. Contact your GP if your newborn baby has signs of an eye infection.
Allergic conjunctivitis can be caused by an allergy, such as an allergy to pollen (hay fever), house dust mites or cosmetics.
There are four types of allergic conjunctivitis:
Seasonal allergic conjunctivitis - this affects both of your eyes and people often get it at the same time as hay fever
Perennial allergic conjunctivitis - people with this type of allergic conjunctivitis have symptoms every day throughout the year in both eyes, often on waking each morning
Contact dermatoconjunctivitis - this type of conjunctivitis can irritate your eyelids and it occurs most often in people who use eye drops
Giant papillary conjunctivitis - this is common in people who use soft contact lenses, although it can also occur in people using hard contact lenses and after eye surgery
I get the second frequently as I do not have tears, and use articial tears when I remember!
I do not exclude either.