Viruses, bacteria, or allergens can cause pink eye. Viral and bacterial pink eye are contagious. Common pink eye symptoms include eyelid swelling, watery eyes, itchiness, irritation, and burning.

What causes pink eyes? “The cause of pink eye can be either viral or bacterial, both of which are highly contagious and ...

Pink eye has ... can cause pink eye. Sleeping on a pillow where bacteria is present or wearing contact lenses that are dirty or aren't your own are common ways bacterial conjunctivitis can develop.