question: 75 yr old man has large (palm sized) rash equi-distant from center of stomach AND equi-distance from spine (above kidney/waist area) Center of rash is pale, rash on back looks like sunburn. Also has similar rash on front of shin. No insect sting, no sunburn, just huge rash. No known food allergies. Rash on back is very hot to the touch. No itching, no pain, just very large rash. thanks Had shingles vaccine last year. Rash is smooth and splotchy...not rough. Edges are irregular