Red eye: Pink eye is usually due to a bacterial infection, the lids get mattery, crusty, and stuck shut. Allergies make the surface of the eye red and produce a clear watery discharge, and is usually associated with some itching, and if you rub the eye you can get it secondarily infected and end up with a pink eye condition in addition. A cold is associated with a clear discharge and it can be infected.
Answered 12/31/2018
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