Yesterday, I was cutting down some trees when I felt a couple sharp pains on my stomach and chest. I lifted my shirt to look. There were 2 red spots that appeared to be lightly bleeding. Not even enough to drip. With in a couple minutes, those areas began to burn and sting. I looked again and a welt had form at the two spots, with a large red area around the welts. Today, the 2 red dots have disappeared, but the large red area is still there. It is hot to the touch, itchy, and the tissue feels like it is getting hard. At the edge of one of these large red areas, there appears to be a couple small sores developing. These could be from scratching, but I am not sure. I do not know if these came from the thorns on the trees, as we were cutting down both locust trees and hedge trees, or if it could have been a bug bite. We saw multiple types of ant, and a small beetle that were falling from the trees onto us. What should I do? Should I go see my doctor? Would this warrant an ER visit?