What causes a little red inflamed bump in your eye?

Did it start out as a red bump, or had you noticed it before - was it a clear to light yellowish color? Its most likely pingueculitis caused by any one of a number of things... contact lenses brushing against them, allergies, rubbing the eyes... If it's not terribly bothersome, you can probably use an over the counter eye drop, but - if you're having any discharge, watering or light sensitivity it could more of an infection, at which point, I'd advise seeing your primary care physician or your Optometrist/Opthamalogist so they can prescribe you an antibiotic or steroid drop to clear that up. Hope that helped... Cindy