I didn't have covid but I'm long term vaccine injured (7 months) - many of the same symptoms. I have been using two products created by a mom who was trying to cure her daughter's eczema. The website is: satyaorganics.com
What's nice about the two sticks is that you can use them anytime and as much as you want because they are natural. I've found that rash meds just dry out your skin then you are left with even dryer itchier skin. This stuff has natural healing ingredients but also keeps your skin very hydrated so it doesn't get dry. Hope that helps a little.