Hi. Sporadically, I have a red, itchy blotch or rash appear on my ankles, top of feet, wrist, and some areas of my back (low and between shoulders). I ll be watching tv and they will just appear on my ankle (usually just one) literally - I feel an itch coming on and I look at my foot and there is a botch of red rash and it itches. It calms with cortisone cream. Then, it will go away. Any ideas? I have not switched detergents, soap, etc. Thank you.