I too have this problem. I have had Covid twice, first time in July 2020. Both times, my symptoms were mild, but it’s the lasting effects that have tormented me. I periodically get itchy rashes on my body and now I’m allergic to things I was never allergic to before…poison oak, being one of them. I’m allergic to bug bites now (mosquito) and have had to get IM Decahedron, along Oral Prednisone twice. It’s the strangest thing. I also have horrible neuropathy in my feet (had Covid toes) and Raynaud's, now. My immune system is also in attack mode. So frustrating.