While I was riding my bike, an insect flew into my eye, and now its red and swollen. What should I do to treat it?

Immediately flush your eye with water, avoid rubbing or touching the eye, and remove any contact lenses; then, apply a cold compress to reduce swelling, and use over-the-counter antihistamine or anti-allergic eye drops, such as chlorpheniramine or ketotifen, to alleviate redness and itchin