I have a small bump that developed under my index finger ( on the palm side ), it is positioned just above my highest joint, when it first developed it was very hard to see because it was flesh colored. It has grown more white colored, and gradually more noticable. when i pull my finger back, it is very noticable, as it appears round and white. It is also very flat. It is not really irritating either, it is not itchy. I was thinking it could be a wart, but I am not sure. I have never had a wart before. There are no explicit black dots representing blood vessels. There is no sign of a "cauliflower" either, as it is perfectly smooth. I am exposed to plantar wars daily, as my roommate has it, he picks it a lot, and he never washes his hands, so maybe my finger was somehow infected.