Can you describe this small bump in more detail?
Is it red and inflammed? Oozing?
Does it itch or hurt?
Is it on top of the skin or under it?
Would you call it a pimple, wart, skin tag, tumor, cyst or growth?
How close to the eye is it?
Does it bother her?
Is it growing in size?
Does she have more than one?
Is there hair loss?
If it isn't bothering her and she isn't scratching or rubbing at it, the best treatment is no treatment until you have her seen by a vet. If you have however an actual eye ointment at home called BNP opthalmic (only available by prescription) then you can use this as it is an antibiotic ointment but it is safe for the eyes. Chances are no topicals are going to penetrate the skin well enough to have an effect until the skin is broken so it may just become an annoyance as applying topicals will draw attention to the area.
Let me know if further assistance is needed.