A single flat, dime-sized red spot suddenly appeared on my right shin 2 or 3 weeks ago. I first thought it might be a bug bite, but at that point it never itched or blistered as bites usually do. I tried iodine, then creams, but stopped using anything since nothing caused it to go away. Then it began to flake and feel itchy. The margins are smoothe. It has not been painful or felt feverish at any time. I have not had trauma to the leg. I have not changed laundry products. I bathe nightly, shaving my legs nightly, also. I am a 65 year old high school teacher, and am active but not an outdoors-y person.