Like 5 days ago I went to the er, got an iv stick that led to a blown vein. Anyway, I just had pain in that wrist for a couple days. But today, which is the fifth day, after I got out of the shower I noticed a huge yellow and purple bruise that covered most of my wrist. The thing is, now it's gone. It only stayed for the time I was in the shower till a couple minutes after I dried off...I've never had a bruise just appear and disappear within a few minutes, especially a huge one! I'm sure it can't be dangerous but it just seems weird!