I too have lipodermatasclerosis on my left lower leg, following a bad fall in my mid-twenties, and two bouts of thrombophlebitis/cellulitis in my fifties. I have skin discolouration on both shins but that is more brown than red. The left leg gets redder and warmer if things flare up, but seldom itches. The right leg is just brown; it doesn't get excited about anything. The brown on both legs developed from about 40 years old.
My father had brown skin on both shins & lower legs, but his never itched. I think some of mine is hereditary.
I regularly use lots of moisturiser on both lower legs, and I have Fucibet cream for when the left leg starts to flare up. I also do foot exercises to keep the circulation going (raise foot and point toe; rotate left for a count of 30, right for a count of thirty, then move up and down, still pointing the toe, for another count of thirty. Do this as often as you remember). The massage than comes with the moisturising helps the circulation as well. Us diabetics have to be particularly careful of the thin skin on our shins
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Cellulitis is red, hot and very itchy. If that comes back I wrap a pack of frozen peas in a tea-towel to use as an ice-pack, and apply the Fucibet diligently! I usually go to the GP as well, just to be on the safe side. Now I've developed Type 2 I'd be even more sure to visit the GP.
Don't frighten yourself too much by Googling lipodermatosclerosis. I have no intention of developing "beer bottle legs" - and anyway, my second favourite GP doesn't think I have it
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Viv
PS Have you recently bought a new pair of trousers in a different material? I have to stick to cotton - polyester doesn't suit my shin at all.