What Red Burnt Marks On Arms And Legs?

I have devloped what looks like red cigarette looking burns on my body (not my face) It statrted on my legs, then my arms and now my shoulders. I have a low grade fever and very, very tired. I have used calmine lotion and an otc anti-intch cream. I feel queasy most of the time. I have not changed any products. I was diagnosed last year with pulmanary fibrosis and have shortness of breath as well.

I am an 8-year breast cancer survivor for which I was treated with radiation.

I manage to work each day still but I simply feel awful. I have to cover up from neck to feet. Can you assist me please?