What should I do to treat pink eye?

Stay Away. True pink eye is usually slang for viral conjunctivitis. It is commonly seen in children as it is so contagious. If the eye is red, however, there are many causes and should be seen by your eye doctor.
Eval. Antibiotic eye drops can be used to treat bacterial pink eye. Most viral conjunctivitis does not require treatment (but antiviral meds may used if it is a herpes simplex virus infection). Allergic conjunctivitis may be treated with mast cell stabilizers or antihistamines.