Hi there it has recently been very hot - and out of the norm i went for a run, did some yoga on the grass and did a heavy leg workout particularly on my hamstrings. I have discovered 2 very itchy red areas behind both knees and the bottom of my hamstrings. They are 2 inches in diameter with a tiny white spot, in the same place on each leg. At first i though it was down to sweat but they haven t gone away in 48 hours.. so am wondering what they could be and hot to treat them. They get very itchy in the evening after a day in a suit in the office. Thanks for your help!