It's helpful to know that only infectious conjunctivitis (meaning pink eye caused by viruses or bacteria) is contagious.

To find the right relief for pink eye and determine whether medical treatment is necessary, you need to determine the root cause of the condition: Is it bacterial or viral? Viral pink eye symptoms ...

Conjunctivitis can be contagious if it results from a viral or bacterial infection. It can spread when bacterial or viral particles from one person’s eye enter another person’s eye.

However, bacterial pink eye can be transmissible from the moment you develop symptoms until 48 hours after you start your antibiotic treatment. Viral pink eye is transmissible for as long as you ...

As such, unlike other types of conjunctivitis, such as viral and bacterial conjunctivitis, allergic conjunctivitis is not contagious and cannot spread to others.

Viral conjunctivitis starts with one eye and spreads to the other and can occur with symptoms of flu and respiratory infections. On the other hand, bacterial conjunctivitis is associated with ...

"Viral conjunctivitis lasts a few days to a week," says Epling, while bacterial pink eye may last until it's treated with drops or ointment, "but should then resolve in a few days." Allergic ...