Ask an Eye Doctor and Get an Answer ASAP
Pain or itch?
One eye or both?
Are you aware of anything which might have triggered it?
redness? tears? any other symptoms?
Did you touch the eye with your hand before you noticed it?
You should take over-the-counter antihistamine medication such as Allegra. Zyrtec & Benadryl could make you sleepy. Claritin may not work well.