Late yesterday afternoon after gardening I noticed my arm was itchy with many little colorless bumps, then my eyelid had an itchy bump, then two and my eyelid was swollen. Next morning I had a few on my face, then one on the other eye, all very itchy. I looked over my bed with a magnifying glass, but saw nothing. I've been putting poultices of plantain to stop the itch and swelling, but don't know what is causing this.