I have had tremendously itchy rashes only on my calves since having covid in 2020. They erupt in anywhere from a pinpoint to a quarter size, run in a line down the calf so probably down a nerve, itch like crazy when erupting and can take weeks to months to heal. Mine are dark red in color and have a raised, dry surface...the first year or so it would create a shiny scale (like on a fish) that would flake off. I have been diagnosed with scleroderma then eczema then dermatitis then cellulitis so who know what it is. I have topical cortisone creams that contain the itching and have tried about 20 lotions/creams, OTC and prescription. The only cream to work as a preventative is colloidal oat cream from Canada. As soon as I feel a tingling, I put it on and the rashes does not appear. Now using it daily.