I was raking leaves in Ottawa Ontario yesterday (oak tree) and in the evening I had pain in my forearm (felt like a muscle pull), the arm bothered me all night, felt tingly and numb and hurt to make a fist. This morning I have a bruise on my forearm starting at the wrist -approximately 2 in. wide by 4 inches long. Could a bug/spider bite cause something like this? I did not see or feel anything sting or bite. I have taken Benadryl twice today and it is starting to feel better. I am 47, 5'6", 165lbs, generally healthy, Cogan's disease but asymptomatic for the past year. Anne