About 8 months ago I was cutting a tree up. The tree was surrounded by tall weeds. About 3 days later I started to itch extremely bad. I thought that I had got poison ivy or poison oak. I went to the doctor and he gave me some steroids to take. I took them and they did not work. I then went to the local pharmacy to find something I could use. I found a little bottle of cream that was supposed to get rid of any skin irritation. This did not work. So now I do not know what to do. These little bumps just pop up randomly, itch for about 5 minutes and then go away. I also itch everywhere else too. But before I will start to itch the bump will already form. It looks like a mosquito bite but it does not itch until it is a big red bump. I cant help but scratch it. What is weird about them is that let's say I have one of these bumps on the back of my hand. I hold my hand down and let blood rush to it. The bump goes white while everything else turns red like normal. I would really love a little insight on what this might be. Thank you!