Skin itch without a rash
I’m 79 years old, male. Three years ago I had an onset of skin itch with no rash localized in thorax, arms, neck and back. Coincidentally this onset appeared after I was treated for a bout of pulmonary obstruction due to many years of past smoking. Since that time I have seen 4 dermatologists one inmunologist and one homeopath. I have never had a history of allergy of any kind. I don’t respond to any of the antihistamines, only the itch is calmed by taking 10 mg of prednisone daily which I have been using for three years. I have been tested to what I think all the laboratory tests designed for allergy and autoimmune diseases, all within normal range. Anyone have a suggestion?