I have been itchy on the back of my knee for at least a month. Until recently I didn t notice anything there until last week when I saw what looked like a bug bite. (slightly raised small area skin color). I of course scratched it so much it bled then scabbed over. The surrounding area continued to itch until I tried cortisone which mildly helped. I then started using lotrimin and that s made a large improvement. The itch is not nearly as intense but I am still concerned... Any ideas?