Suggest Treatment For Red, Itchy And Scaly Skin

I have had red itchy scaly skin for a few months. have tried all different kinds of creams. almost looks like it was a burnt when is started. It is very itchy. seems to be spreading up my leg. there is scabs in a few places from being dry and me scratching. does not want to heal. my work boots do rub in this area also. I have tried covering it up but seems to get really red and irritated. I have also tried not using any cream and just letting the air at it. then it gets so dray and scaly it starts to itch.