I also started experiencing reddened, itchy patches, areas on my arms, chest, neck in month 11 post covid. The rash is teeny bumps difficult to see until scratched at which point they become large, swollen patches. Claritin helps itch but comes back. Dermatologist gave me prednisone for two weeks and it cleared but returned about 3-5 days after stopping. My fingernails continue to lift and fall off as well. I’m now in month 13 post covid, as well as having Covid infection for a second time in February. Rumbling vibrations in my head continue…