shingles how long before rash
1 Somewhere between 1 and 5 days after the tingling or burning feeling on the skin, a red rash will appear. 2  A few days later, the rash will turn into fluid-filled blisters. 3  About a week to 10 days after that, the blisters dry up and crust over.  A couple of weeks later, the scabs clear up.