Hi, My father is 72 and had a shingles vaccine 2-3 weeks ago...around that same time he found a tick on him which left a bulls eye rash on his arm. A few days later he broke out in a rash on his trunk , back and legs it will not go away. He has taken benadryl, we have bought laundry detergent for sensitive skin and changed to ivory soap. Nothing has helped . Yesterday the rash on his back around the belt line was worse and he said it hurt.
Hello, It looks like your father is having allergic reactions (hives) due to the vaccine or blistering rash due to shingles, these rashes cause itching, burning & pain that hurts. You can give him defense Chat Doctor.  He can apply Capsaicin cream. For pain Acetaminophen (Tylenol), Naproxen. Take him to ER, let him get physically examined, he may need antivirals (Acyclovir), etc. Get evaluated & treated at the earliest.  Hope I have answered your query. Let me know if I can assist you further. 