Conjunctivitis is extremely contagious and requires evaluation by medical personnel to obtain appropriate treatment, states Mayo Clinic. Without treatment, conjunctivitis, or pink eye, remains contagious for up to two weeks after the onset of symptoms.
Pink eye results from an incompletely opened tear duct in newborns, viral and bacterial infections or allergic reactions. Symptoms include tearing, redness, itching and discharge in one or both eyes. Antibiotic eyedrops or ointments treat bacterial conjunctivitis, providing symptom relief in a matter of days, reports Mayo Clinic. Antihistamine, decongestant or steroid eye drops reduce inflammation in allergic conjunctivitis. As of 2015, no treatment exists for viral conjunctivitis. The infection requires two to three weeks to resolve on its own.