I had a welt or hive that I noticed on my left side of stomach, close to the naval. It was round and red, about the size of a flattened small lime. I discovered it while drying off from the shower. The next day I could see it began to fade, almost like it was fading left to right. Today, it s almost gone, however the area that s still visible has a dry feel and look to it. It never itched. If it wasn t for me seeing it in the mirror I wouldn t have known it was there. What could this be or could have been?