I have had a blistery ,itchy rash on my legs. It started on my left leg when I brushed my shin bone quite badly .That was about a year ago. Now I have a bunch of hard light pink to red welts that have extremely itchy blister on the back of my calves.the welts start as itchy blisters then the hard welts form. I have had it for about 6months-.In the last week I have been getting little itchy blister on my upper thighs. I am on dieretics and have swelling from the knees down.,some days worse than others.I am also on thyroid MDS. Cholesterol medication. My legs are quite swollen. Also I have dry itchy skin on the front of my uncle s Cab you help me??????????