Report Pimple like Rash on son's back in PANS / PANDAS (Lyme included) Posted December 6, 2012 DD got PR rash three and a half weeks after IVIG. I am wondering if it could have come from the IVIG as I am sure they don't screen for that. Luckily, PR is usually pretty harmless though DD had low grade fever befoe the rash and it hit 101.5 the day after it appeared. DS had IVIG at same time and am starting to see improvements. DD, although better in some ways--the jerks that were annoying her so much are gone, but she continues to have assorted problems--fatigue, nausea etc. Thanks for asking.