I've what seems like exactly the same rash as with your photo. I get it on my shins just higher than my ankles. Have you ever tried out OTC cortisone cream? I apply it following showering and it does take the itch absent. Chilblains LE. Purplish or crimson swollen https://lupus-erythematosus65607.blogkoo.com/a-review-of-lupus-arthritis-57910230