Hi Dr Rynne, I have what I believe to be bite, on the back of my leg. It started itching a little last night, I went to bed. It woke me up once still itching, but I went back to sleep. This AM, it is raised, and hard, about the size of a golf ball. It has continued to increase in size over the last 6 hrs, it is now larger than a baseball and is wrapping to the front of my leg. It is still hard, red, itchy and warm.