Hi all, my 2 years old hurt his finger two days ago and has what I think is a blood blister. It's completely flat but there is blood under the skin. Is there anything I can do to treat this? My four year old did something similar to his palm when he was younger, I left it and it turned into what looks like an odd shaped beauty spot that is permanent, he really dislikes it and I feel really bad that there is probably something I could have done, and now I don't want to do the same with the little one. Can anyone help please???