I have read the following post from St. Emlyn’s Emergency Medicine blog multiple times. It includes a great synopsis of the literature and thoughts on the evaluation of well appearing children with non-blanching rashes.
You can check out the post in its entirety via this link – right here.
Don’t Be Rash – Petechiae in Well Kids at St. Emlyn’s
Natalie May / July, 2013
Bonus
Here is a video of some quick ways to see if a rash is non-blanching