hot compress with epsom salt might help dry out the bump and get it to go away.
If it's on the outter lid, under the brow...it could be an insect bite, ingrown hair, staph, pimple or several other things. You could be having an allergic reaction to an insect bite. If it is under the lashed or under the lid, it is probably a sty.
You can try a hot compress and see if this helps. Get a wet rag with hot water and lay over your eye.
Do you think this is an insect bite of some sort?
Any allergies?