Let me explain what happens and maybe that will help with the diagnosis. I can step outside with shorts on and walk through the grass bare foot, say to get the mail. I can come in and have two to three bumps randomly on my body (legs and arms mostly) that are very itchy. I apply aloe and that sort of helps the itchiness. I will say the grass is really weeds (for the most part) and they are not high weeds because I mow them. The bumps start out small and then grow to about an inch in diameter. They are not perfect circles but just blobs that are pretty big. I can get them just being outside. I can step outside onto pavement for a minute and go in and start feeling the itchiness and then it turns to a large bump. Not a high bump but a large bump. I can control the scratching and have come to the conclusion that the size isn't from scratching. Not sure what to think.