I ve discovered these small bumps on the front of my ear lobes and on the side of my jaw and neck. They aren t really visible unless you look up close and they itch slightly. I m thinking I got it from our foam pool rafts. I laid out a couple days ago and while lying on my stomach I put my head to the side, in contact with the raft. I m not sure if it was the next day or the day after that I noticed the bumps. Up until now I had no idea where I could have gotten them from. Tonight I used the rafts to hold onto to float around the pool, after I had gotten out and dried off, I notices a few bumps on the back side of my upper arm. Its a couple hours later and the bumps have faded away on my arm but on my ear they are still there.