Well, conjunctivitis is pink eye and pink eye is conjunctivitis, they are the same thing. Just medically we called pink eye as conjunctivitis. Conjunctivitis is an inflammation of the membrane covering the back of the eyelids and surface of the eyeball up to the cornea. It is easy to be caused by cats, dogs which are allergies and bacteria, virus and germs which cause eye infections. Conjunctivitis is a common diseases which do slightly harmful to human health, even it will be fine without any treatment option in seven days. However, conjunctivitis still needs to be taken good care of it. Conjunctivitis can spread person to person in public and you may also get worse when you stay out because of bacteria and virus in the air. So the best way to keep your health and heal your pink eye, you'd better stay at home and get away from public. That's also help with preventing pink eye from spreading and infecting to other people.